European Union Aviation Part-66 ?
Techniques Electronic Instrument Systems
Exam
,1. During a pre-task planning review, which action best addresses a concern involving Sensors and transducers for temperature, pressure, flow, level, position
and speed with decisions and evidence? Case EB-2657-0001: 2 checks are complete, 3 item(s) remain open, 2 supporting record(s) are available, the last
review was 7 hour(s) ago, and the current result differs from the prior baseline by 15 unit(s).
A. Adjust an input until the result falls within the target range, then record only the final value.
B. Proceed using an estimate even though the approved method and current inputs are available.
C. Recheck the inputs, units, assumptions, and limits for Sensors and transducers for temperature, pressure, flow, level, position and speed with; recalculate
independently and document the verified result before proceeding.
D. Select the most favorable result from repeated calculations without investigating the variation.
Correct Answer: C
Explanation: The best answer verifies Sensors and transducers for temperature, pressure, flow, level, position and speed with against current requirements and
evidence before acceptance. With 3 open item(s), 2 supporting record(s), and a 15-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
2. During a pre-task planning review, which action best addresses a concern involving Measurement instruments, loading effects, calibration and uncertainty for
safe, accurate work in electronics and? Case EB-2657-0002: 9 checks are complete, 4 item(s) remain open, 6 supporting record(s) are available, the last
review was 20 hour(s) ago, and the current result differs from the prior baseline by 13 unit(s).
A. Recheck the inputs, units, assumptions, and limits for Measurement instruments, loading effects, calibration and uncertainty for safe, accurate; recalculate
independently and document the verified result before proceeding.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: A
Explanation: The best answer verifies Measurement instruments, loading effects, calibration and uncertainty for safe against current requirements and evidence
before acceptance. With 4 open item(s), 6 supporting record(s), and a 13-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
3. During a pre-task planning review, which action best addresses a concern involving Control loops, setpoints, feedback, stability and PID response through
realistic electronics and instrumentation? Case EB-2657-0003: 7 checks are complete, 1 item(s) remain open, 3 supporting record(s) are available, the last
review was 9 hour(s) ago, and the current result differs from the prior baseline by 11 unit(s).
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Average the conflicting results and accept the midpoint without checking the source data.
C. Recheck the inputs, units, assumptions, and limits for Control loops, setpoints, feedback, stability and PID response through realistic; recalculate
independently and document the verified result before proceeding.
D. Use the previous calculation unchanged even though one or more current inputs have changed.
Correct Answer: C
Explanation: The best answer verifies Control loops, setpoints, feedback, stability and PID response through realistic against current requirements and
evidence before acceptance. With 1 open item(s), 3 supporting record(s), and a 11-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
4. During a pre-task planning review, which action best addresses a concern involving Schematic interpretation, signal tracing and fault isolation with emphasis
on boundaries and responsibilities in? Case EB-2657-0004: 5 checks are complete, 2 item(s) remain open, 7 supporting record(s) are available, the last review
was 22 hour(s) ago, and the current result differs from the prior baseline by 9 unit(s).
A. Protect personnel and equipment, stabilize the immediate condition related to Schematic interpretation, signal tracing and fault isolation with emphasis on
boundaries, follow the approved response procedure, and document/escalate remaining risk.
B. Restart as soon as the immediate symptom disappears without verifying the required safeguards.
C. Move the affected personnel closer to the task so they can observe the condition directly.
D. Bypass the protective control temporarily so the task can be completed on time.
Correct Answer: A
Explanation: The best answer verifies Schematic interpretation, signal tracing and fault isolation with emphasis on against current requirements and evidence
before acceptance. With 2 open item(s), 7 supporting record(s), and a 9-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
5. During a pre-task planning review, which action best addresses a concern involving Power supplies, grounding, shielding, electromagnetic compatibility and
noise control for defensible calculations? Case EB-2657-0005: 3 checks are complete, 3 item(s) remain open, 4 supporting record(s) are available, the last
review was 11 hour(s) ago, and the current result differs from the prior baseline by 7 unit(s).
A. Use the previous calculation unchanged even though one or more current inputs have changed.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Adjust an input until the result falls within the target range, then record only the final value.
D. Recheck the inputs, units, assumptions, and limits for Power supplies, grounding, shielding, electromagnetic compatibility and noise control for; recalculate
independently and document the verified result before proceeding.
Correct Answer: D
Explanation: The best answer verifies Power supplies, grounding, shielding, electromagnetic compatibility and noise control against current requirements and
evidence before acceptance. With 3 open item(s), 4 supporting record(s), and a 7-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
Page 2
,6. During a pre-task planning review, which action best addresses a concern involving Programmable controllers, input/output mapping, interlocks and
sequence logic including recognition of abnormal or? Case EB-2657-0006: 10 checks are complete, 4 item(s) remain open, 1 supporting record(s) are
available, the last review was 24 hour(s) ago, and the current result differs from the prior baseline by 5 unit(s).
A. Defer the unresolved point until the task is complete and document it retrospectively.
B. Repeat only the final step without checking the underlying inputs, conditions, or controls.
C. Change the acceptance criterion to match the observed condition without formal approval.
D. Verify the current requirement and objective evidence for Programmable controllers, input/output mapping, interlocks and sequence logic including, resolve
the discrepancy, and document the basis for proceeding.
Correct Answer: D
Explanation: The best answer verifies Programmable controllers, input/output mapping, interlocks and sequence logic including against current requirements
and evidence before acceptance. With 4 open item(s), 1 supporting record(s), and a 5-unit change from baseline, a traceable foundational decision should
resolve the discrepancy rather than defer, bypass, or redefine the control.
7. During a pre-task planning review, which action best addresses a concern involving Communication buses, networked instruments and diagnostic status
information to support reliable, ethical? Case EB-2657-0007: 8 checks are complete, 1 item(s) remain open, 5 supporting record(s) are available, the last review
was 13 hour(s) ago, and the current result differs from the prior baseline by 3 unit(s).
A. Delay communicating the discrepancy until the end of the shift so operations are not interrupted.
B. Allow different team members to act on different interpretations of the same instruction.
C. Send the information through an unapproved channel without confirming receipt.
D. Establish a shared understanding of Communication buses, networked instruments and diagnostic status information to support, use the required
communication protocol, cross-check critical information, and record or escalate any unresolved ambiguity.
Correct Answer: D
Explanation: The best answer verifies Communication buses, networked instruments and diagnostic status information to support against current requirements
and evidence before acceptance. With 1 open item(s), 5 supporting record(s), and a 3-unit change from baseline, a traceable foundational decision should
resolve the discrepancy rather than defer, bypass, or redefine the control.
8. During a pre-task planning review, which action best addresses a concern involving Mass, balance, takeoff, climb, cruise, landing and obstacle calculations
integrated across the tasks expected in? Case EB-2657-0008: 6 checks are complete, 2 item(s) remain open, 2 supporting record(s) are available, the last
review was 2 hour(s) ago, and the current result differs from the prior baseline by 1 unit(s).
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Recheck the inputs, units, assumptions, and limits for Mass, balance, takeoff, climb, cruise, landing and obstacle calculations integrated across; recalculate
independently and document the verified result before proceeding.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: B
Explanation: The best answer verifies Mass, balance, takeoff, climb, cruise, landing and obstacle calculations integrated against current requirements and
evidence before acceptance. With 2 open item(s), 2 supporting record(s), and a 1-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
9. During a pre-task planning review, which action best addresses a concern involving Communications, airspace procedures and safe coordination with air
traffic services within the electronics and? Case EB-2657-0009: 4 checks are complete, 3 item(s) remain open, 6 supporting record(s) are available, the last
review was 15 hour(s) ago, and the current result differs from the prior baseline by 18 unit(s).
A. Establish a shared understanding of Communications, airspace procedures and safe coordination with air traffic services within, use the required
communication protocol, cross-check critical information, and record or escalate any unresolved ambiguity.
B. Send the information through an unapproved channel without confirming receipt.
C. Use informal wording for critical information and omit any required confirmation or read-back.
D. Assume the other party understood the message because no questions were asked.
Correct Answer: A
Explanation: The best answer verifies Communications, airspace procedures and safe coordination with air traffic services against current requirements and
evidence before acceptance. With 3 open item(s), 6 supporting record(s), and a 18-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
10. During a pre-task planning review, which action best addresses a concern involving Entry-level terminology, component recognition and safe completion of
routine tasks as applied to electronics and? Case EB-2657-0010: 2 checks are complete, 4 item(s) remain open, 3 supporting record(s) are available, the last
review was 4 hour(s) ago, and the current result differs from the prior baseline by 16 unit(s).
A. Treat the issue as administrative and continue while the evidence remains unresolved.
B. Verify the current requirement and objective evidence for Entry-level terminology, component recognition and safe completion of routine tasks as, resolve the
discrepancy, and document the basis for proceeding.
C. Rely on an experienced colleague's verbal assurance instead of obtaining objective evidence.
D. Defer the unresolved point until the task is complete and document it retrospectively.
Correct Answer: B
Explanation: The best answer verifies Entry-level terminology, component recognition and safe completion of routine tasks as against current requirements and
evidence before acceptance. With 4 open item(s), 3 supporting record(s), and a 16-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
Page 3
, 11. A reviewer finds conflicting evidence about Sensors and transducers for temperature, pressure, flow, level, position and speed with decisions and evidence
during a pre-task planning review. What should happen first? Case EB-2657-0011: 9 checks are complete, 1 item(s) remain open, 7 supporting record(s) are
available, the last review was 17 hour(s) ago, and the current result differs from the prior baseline by 14 unit(s).
A. Confirm source data and allowable limits for Sensors and transducers for temperature, pressure, flow, level, position and speed with, repeat the calculation
with an independent check, and resolve any difference before acceptance.
B. Average the conflicting results and accept the midpoint without checking the source data.
C. Select the most favorable result from repeated calculations without investigating the variation.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: A
Explanation: The best answer verifies Sensors and transducers for temperature, pressure, flow, level, position and speed with against current requirements and
evidence before acceptance. With 1 open item(s), 7 supporting record(s), and a 14-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
12. A reviewer finds conflicting evidence about Measurement instruments, loading effects, calibration and uncertainty for safe, accurate work in electronics and
during a pre-task planning review. What should happen first? Case EB-2657-0012: 7 checks are complete, 2 item(s) remain open, 4 supporting record(s) are
available, the last review was 6 hour(s) ago, and the current result differs from the prior baseline by 12 unit(s).
A. Adjust an input until the result falls within the target range, then record only the final value.
B. Proceed using an estimate even though the approved method and current inputs are available.
C. Confirm source data and allowable limits for Measurement instruments, loading effects, calibration and uncertainty for safe, accurate, repeat the calculation
with an independent check, and resolve any difference before acceptance.
D. Select the most favorable result from repeated calculations without investigating the variation.
Correct Answer: C
Explanation: The best answer verifies Measurement instruments, loading effects, calibration and uncertainty for safe against current requirements and evidence
before acceptance. With 2 open item(s), 4 supporting record(s), and a 12-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
13. A reviewer finds conflicting evidence about Control loops, setpoints, feedback, stability and PID response through realistic electronics and instrumentation
during a pre-task planning review. What should happen first? Case EB-2657-0013: 5 checks are complete, 3 item(s) remain open, 1 supporting record(s) are
available, the last review was 19 hour(s) ago, and the current result differs from the prior baseline by 10 unit(s).
A. Confirm source data and allowable limits for Control loops, setpoints, feedback, stability and PID response through realistic, repeat the calculation with an
independent check, and resolve any difference before acceptance.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: A
Explanation: The best answer verifies Control loops, setpoints, feedback, stability and PID response through realistic against current requirements and
evidence before acceptance. With 3 open item(s), 1 supporting record(s), and a 10-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
14. A reviewer finds conflicting evidence about Schematic interpretation, signal tracing and fault isolation with emphasis on boundaries and responsibilities in
during a pre-task planning review. What should happen first? Case EB-2657-0014: 3 checks are complete, 4 item(s) remain open, 5 supporting record(s) are
available, the last review was 8 hour(s) ago, and the current result differs from the prior baseline by 8 unit(s).
A. Assume the abnormal condition is acceptable because no injury or damage has occurred yet.
B. Bypass the protective control temporarily so the task can be completed on time.
C. Continue the activity until the scheduled break, then review the safety concern.
D. Stop or control the affected activity, assess the hazard associated with Schematic interpretation, signal tracing and fault isolation with emphasis on
boundaries, apply the approved safeguard, and verify conditions before restarting.
Correct Answer: D
Explanation: The best answer verifies Schematic interpretation, signal tracing and fault isolation with emphasis on against current requirements and evidence
before acceptance. With 4 open item(s), 5 supporting record(s), and a 8-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
15. A reviewer finds conflicting evidence about Power supplies, grounding, shielding, electromagnetic compatibility and noise control for defensible calculations
during a pre-task planning review. What should happen first? Case EB-2657-0015: 10 checks are complete, 1 item(s) remain open, 2 supporting record(s) are
available, the last review was 21 hour(s) ago, and the current result differs from the prior baseline by 6 unit(s).
A. Proceed using an estimate even though the approved method and current inputs are available.
B. Confirm source data and allowable limits for Power supplies, grounding, shielding, electromagnetic compatibility and noise control for, repeat the calculation
with an independent check, and resolve any difference before acceptance.
C. Adjust an input until the result falls within the target range, then record only the final value.
D. Average the conflicting results and accept the midpoint without checking the source data.
Correct Answer: B
Explanation: The best answer verifies Power supplies, grounding, shielding, electromagnetic compatibility and noise control against current requirements and
evidence before acceptance. With 1 open item(s), 2 supporting record(s), and a 6-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
Page 4
Techniques Electronic Instrument Systems
Exam
,1. During a pre-task planning review, which action best addresses a concern involving Sensors and transducers for temperature, pressure, flow, level, position
and speed with decisions and evidence? Case EB-2657-0001: 2 checks are complete, 3 item(s) remain open, 2 supporting record(s) are available, the last
review was 7 hour(s) ago, and the current result differs from the prior baseline by 15 unit(s).
A. Adjust an input until the result falls within the target range, then record only the final value.
B. Proceed using an estimate even though the approved method and current inputs are available.
C. Recheck the inputs, units, assumptions, and limits for Sensors and transducers for temperature, pressure, flow, level, position and speed with; recalculate
independently and document the verified result before proceeding.
D. Select the most favorable result from repeated calculations without investigating the variation.
Correct Answer: C
Explanation: The best answer verifies Sensors and transducers for temperature, pressure, flow, level, position and speed with against current requirements and
evidence before acceptance. With 3 open item(s), 2 supporting record(s), and a 15-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
2. During a pre-task planning review, which action best addresses a concern involving Measurement instruments, loading effects, calibration and uncertainty for
safe, accurate work in electronics and? Case EB-2657-0002: 9 checks are complete, 4 item(s) remain open, 6 supporting record(s) are available, the last
review was 20 hour(s) ago, and the current result differs from the prior baseline by 13 unit(s).
A. Recheck the inputs, units, assumptions, and limits for Measurement instruments, loading effects, calibration and uncertainty for safe, accurate; recalculate
independently and document the verified result before proceeding.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: A
Explanation: The best answer verifies Measurement instruments, loading effects, calibration and uncertainty for safe against current requirements and evidence
before acceptance. With 4 open item(s), 6 supporting record(s), and a 13-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
3. During a pre-task planning review, which action best addresses a concern involving Control loops, setpoints, feedback, stability and PID response through
realistic electronics and instrumentation? Case EB-2657-0003: 7 checks are complete, 1 item(s) remain open, 3 supporting record(s) are available, the last
review was 9 hour(s) ago, and the current result differs from the prior baseline by 11 unit(s).
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Average the conflicting results and accept the midpoint without checking the source data.
C. Recheck the inputs, units, assumptions, and limits for Control loops, setpoints, feedback, stability and PID response through realistic; recalculate
independently and document the verified result before proceeding.
D. Use the previous calculation unchanged even though one or more current inputs have changed.
Correct Answer: C
Explanation: The best answer verifies Control loops, setpoints, feedback, stability and PID response through realistic against current requirements and
evidence before acceptance. With 1 open item(s), 3 supporting record(s), and a 11-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
4. During a pre-task planning review, which action best addresses a concern involving Schematic interpretation, signal tracing and fault isolation with emphasis
on boundaries and responsibilities in? Case EB-2657-0004: 5 checks are complete, 2 item(s) remain open, 7 supporting record(s) are available, the last review
was 22 hour(s) ago, and the current result differs from the prior baseline by 9 unit(s).
A. Protect personnel and equipment, stabilize the immediate condition related to Schematic interpretation, signal tracing and fault isolation with emphasis on
boundaries, follow the approved response procedure, and document/escalate remaining risk.
B. Restart as soon as the immediate symptom disappears without verifying the required safeguards.
C. Move the affected personnel closer to the task so they can observe the condition directly.
D. Bypass the protective control temporarily so the task can be completed on time.
Correct Answer: A
Explanation: The best answer verifies Schematic interpretation, signal tracing and fault isolation with emphasis on against current requirements and evidence
before acceptance. With 2 open item(s), 7 supporting record(s), and a 9-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
5. During a pre-task planning review, which action best addresses a concern involving Power supplies, grounding, shielding, electromagnetic compatibility and
noise control for defensible calculations? Case EB-2657-0005: 3 checks are complete, 3 item(s) remain open, 4 supporting record(s) are available, the last
review was 11 hour(s) ago, and the current result differs from the prior baseline by 7 unit(s).
A. Use the previous calculation unchanged even though one or more current inputs have changed.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Adjust an input until the result falls within the target range, then record only the final value.
D. Recheck the inputs, units, assumptions, and limits for Power supplies, grounding, shielding, electromagnetic compatibility and noise control for; recalculate
independently and document the verified result before proceeding.
Correct Answer: D
Explanation: The best answer verifies Power supplies, grounding, shielding, electromagnetic compatibility and noise control against current requirements and
evidence before acceptance. With 3 open item(s), 4 supporting record(s), and a 7-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
Page 2
,6. During a pre-task planning review, which action best addresses a concern involving Programmable controllers, input/output mapping, interlocks and
sequence logic including recognition of abnormal or? Case EB-2657-0006: 10 checks are complete, 4 item(s) remain open, 1 supporting record(s) are
available, the last review was 24 hour(s) ago, and the current result differs from the prior baseline by 5 unit(s).
A. Defer the unresolved point until the task is complete and document it retrospectively.
B. Repeat only the final step without checking the underlying inputs, conditions, or controls.
C. Change the acceptance criterion to match the observed condition without formal approval.
D. Verify the current requirement and objective evidence for Programmable controllers, input/output mapping, interlocks and sequence logic including, resolve
the discrepancy, and document the basis for proceeding.
Correct Answer: D
Explanation: The best answer verifies Programmable controllers, input/output mapping, interlocks and sequence logic including against current requirements
and evidence before acceptance. With 4 open item(s), 1 supporting record(s), and a 5-unit change from baseline, a traceable foundational decision should
resolve the discrepancy rather than defer, bypass, or redefine the control.
7. During a pre-task planning review, which action best addresses a concern involving Communication buses, networked instruments and diagnostic status
information to support reliable, ethical? Case EB-2657-0007: 8 checks are complete, 1 item(s) remain open, 5 supporting record(s) are available, the last review
was 13 hour(s) ago, and the current result differs from the prior baseline by 3 unit(s).
A. Delay communicating the discrepancy until the end of the shift so operations are not interrupted.
B. Allow different team members to act on different interpretations of the same instruction.
C. Send the information through an unapproved channel without confirming receipt.
D. Establish a shared understanding of Communication buses, networked instruments and diagnostic status information to support, use the required
communication protocol, cross-check critical information, and record or escalate any unresolved ambiguity.
Correct Answer: D
Explanation: The best answer verifies Communication buses, networked instruments and diagnostic status information to support against current requirements
and evidence before acceptance. With 1 open item(s), 5 supporting record(s), and a 3-unit change from baseline, a traceable foundational decision should
resolve the discrepancy rather than defer, bypass, or redefine the control.
8. During a pre-task planning review, which action best addresses a concern involving Mass, balance, takeoff, climb, cruise, landing and obstacle calculations
integrated across the tasks expected in? Case EB-2657-0008: 6 checks are complete, 2 item(s) remain open, 2 supporting record(s) are available, the last
review was 2 hour(s) ago, and the current result differs from the prior baseline by 1 unit(s).
A. Ignore unit or assumption differences if the final number appears reasonable.
B. Recheck the inputs, units, assumptions, and limits for Mass, balance, takeoff, climb, cruise, landing and obstacle calculations integrated across; recalculate
independently and document the verified result before proceeding.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: B
Explanation: The best answer verifies Mass, balance, takeoff, climb, cruise, landing and obstacle calculations integrated against current requirements and
evidence before acceptance. With 2 open item(s), 2 supporting record(s), and a 1-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
9. During a pre-task planning review, which action best addresses a concern involving Communications, airspace procedures and safe coordination with air
traffic services within the electronics and? Case EB-2657-0009: 4 checks are complete, 3 item(s) remain open, 6 supporting record(s) are available, the last
review was 15 hour(s) ago, and the current result differs from the prior baseline by 18 unit(s).
A. Establish a shared understanding of Communications, airspace procedures and safe coordination with air traffic services within, use the required
communication protocol, cross-check critical information, and record or escalate any unresolved ambiguity.
B. Send the information through an unapproved channel without confirming receipt.
C. Use informal wording for critical information and omit any required confirmation or read-back.
D. Assume the other party understood the message because no questions were asked.
Correct Answer: A
Explanation: The best answer verifies Communications, airspace procedures and safe coordination with air traffic services against current requirements and
evidence before acceptance. With 3 open item(s), 6 supporting record(s), and a 18-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
10. During a pre-task planning review, which action best addresses a concern involving Entry-level terminology, component recognition and safe completion of
routine tasks as applied to electronics and? Case EB-2657-0010: 2 checks are complete, 4 item(s) remain open, 3 supporting record(s) are available, the last
review was 4 hour(s) ago, and the current result differs from the prior baseline by 16 unit(s).
A. Treat the issue as administrative and continue while the evidence remains unresolved.
B. Verify the current requirement and objective evidence for Entry-level terminology, component recognition and safe completion of routine tasks as, resolve the
discrepancy, and document the basis for proceeding.
C. Rely on an experienced colleague's verbal assurance instead of obtaining objective evidence.
D. Defer the unresolved point until the task is complete and document it retrospectively.
Correct Answer: B
Explanation: The best answer verifies Entry-level terminology, component recognition and safe completion of routine tasks as against current requirements and
evidence before acceptance. With 4 open item(s), 3 supporting record(s), and a 16-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
Page 3
, 11. A reviewer finds conflicting evidence about Sensors and transducers for temperature, pressure, flow, level, position and speed with decisions and evidence
during a pre-task planning review. What should happen first? Case EB-2657-0011: 9 checks are complete, 1 item(s) remain open, 7 supporting record(s) are
available, the last review was 17 hour(s) ago, and the current result differs from the prior baseline by 14 unit(s).
A. Confirm source data and allowable limits for Sensors and transducers for temperature, pressure, flow, level, position and speed with, repeat the calculation
with an independent check, and resolve any difference before acceptance.
B. Average the conflicting results and accept the midpoint without checking the source data.
C. Select the most favorable result from repeated calculations without investigating the variation.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: A
Explanation: The best answer verifies Sensors and transducers for temperature, pressure, flow, level, position and speed with against current requirements and
evidence before acceptance. With 1 open item(s), 7 supporting record(s), and a 14-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
12. A reviewer finds conflicting evidence about Measurement instruments, loading effects, calibration and uncertainty for safe, accurate work in electronics and
during a pre-task planning review. What should happen first? Case EB-2657-0012: 7 checks are complete, 2 item(s) remain open, 4 supporting record(s) are
available, the last review was 6 hour(s) ago, and the current result differs from the prior baseline by 12 unit(s).
A. Adjust an input until the result falls within the target range, then record only the final value.
B. Proceed using an estimate even though the approved method and current inputs are available.
C. Confirm source data and allowable limits for Measurement instruments, loading effects, calibration and uncertainty for safe, accurate, repeat the calculation
with an independent check, and resolve any difference before acceptance.
D. Select the most favorable result from repeated calculations without investigating the variation.
Correct Answer: C
Explanation: The best answer verifies Measurement instruments, loading effects, calibration and uncertainty for safe against current requirements and evidence
before acceptance. With 2 open item(s), 4 supporting record(s), and a 12-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
13. A reviewer finds conflicting evidence about Control loops, setpoints, feedback, stability and PID response through realistic electronics and instrumentation
during a pre-task planning review. What should happen first? Case EB-2657-0013: 5 checks are complete, 3 item(s) remain open, 1 supporting record(s) are
available, the last review was 19 hour(s) ago, and the current result differs from the prior baseline by 10 unit(s).
A. Confirm source data and allowable limits for Control loops, setpoints, feedback, stability and PID response through realistic, repeat the calculation with an
independent check, and resolve any difference before acceptance.
B. Ignore unit or assumption differences if the final number appears reasonable.
C. Use the previous calculation unchanged even though one or more current inputs have changed.
D. Proceed using an estimate even though the approved method and current inputs are available.
Correct Answer: A
Explanation: The best answer verifies Control loops, setpoints, feedback, stability and PID response through realistic against current requirements and
evidence before acceptance. With 3 open item(s), 1 supporting record(s), and a 10-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
14. A reviewer finds conflicting evidence about Schematic interpretation, signal tracing and fault isolation with emphasis on boundaries and responsibilities in
during a pre-task planning review. What should happen first? Case EB-2657-0014: 3 checks are complete, 4 item(s) remain open, 5 supporting record(s) are
available, the last review was 8 hour(s) ago, and the current result differs from the prior baseline by 8 unit(s).
A. Assume the abnormal condition is acceptable because no injury or damage has occurred yet.
B. Bypass the protective control temporarily so the task can be completed on time.
C. Continue the activity until the scheduled break, then review the safety concern.
D. Stop or control the affected activity, assess the hazard associated with Schematic interpretation, signal tracing and fault isolation with emphasis on
boundaries, apply the approved safeguard, and verify conditions before restarting.
Correct Answer: D
Explanation: The best answer verifies Schematic interpretation, signal tracing and fault isolation with emphasis on against current requirements and evidence
before acceptance. With 4 open item(s), 5 supporting record(s), and a 8-unit change from baseline, a traceable foundational decision should resolve the
discrepancy rather than defer, bypass, or redefine the control.
15. A reviewer finds conflicting evidence about Power supplies, grounding, shielding, electromagnetic compatibility and noise control for defensible calculations
during a pre-task planning review. What should happen first? Case EB-2657-0015: 10 checks are complete, 1 item(s) remain open, 2 supporting record(s) are
available, the last review was 21 hour(s) ago, and the current result differs from the prior baseline by 6 unit(s).
A. Proceed using an estimate even though the approved method and current inputs are available.
B. Confirm source data and allowable limits for Power supplies, grounding, shielding, electromagnetic compatibility and noise control for, repeat the calculation
with an independent check, and resolve any difference before acceptance.
C. Adjust an input until the result falls within the target range, then record only the final value.
D. Average the conflicting results and accept the midpoint without checking the source data.
Correct Answer: B
Explanation: The best answer verifies Power supplies, grounding, shielding, electromagnetic compatibility and noise control against current requirements and
evidence before acceptance. With 1 open item(s), 2 supporting record(s), and a 6-unit change from baseline, a traceable foundational decision should resolve
the discrepancy rather than defer, bypass, or redefine the control.
European Union Aviation Part-66 ? Techniques Electronic Instrument Systems Exam
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