Civil Aviation Authority Part-66 – Basic Exam
Module 7 Maintenance Practices
,1. Which action best supports a defensible test result for Wiring, connectors, bonding and electrical test technique with decisions and
evidence relevant to during a shift or responsibility handover? The responsible practitioner receives 11 observations from two
sources, with a 19% difference in the most critical value.
A. Compare the observed result with the governing procedure and acceptance standard, verify equipment and controls, and
document the conclusion.
B. Ignore equipment or environmental checks when the operator is experienced with the method.
C. Repeat the test until a passing result is obtained and discard inconsistent earlier results.
D. Change the sensitivity or acceptance limit without authorization to make the result easier to accept.
Correct Answer: A
Explanation: When repeated results for Wiring, connectors, bonding and electrical test technique with decisions differ, the correct
response is to investigate method and equipment factors rather than discard inconvenient evidence.
2. Which action best reduces the risk of a unit, input, or assumption error involving Sheet metal, composite, riveting and structural
repair fundamentals for safe, accurate work in during an incident or deviation follow-up? A sample of 24 items is examined; 3 show a
different condition, and the supporting record is 8 hours old.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: B
Explanation: A result involving Sheet metal, composite, riveting and structural repair fundamentals for is only reliable when its inputs,
units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical error
into the decision.
3. What should a competent practitioner do before authorizing the next step involving Bearing, transmission, cable and control-system
maintenance through realistic aircraft maintenance during a technical documentation review? The field condition and the approved
record agree on most points, but 4 of 37 checked elements require reconciliation.
A. Treat the issue as administrative and continue while the technical evidence remains unresolved.
B. Change the acceptance criterion to match the observed condition without formal authorization.
C. Confirm the applicable criteria and current condition, investigate unresolved differences, and retain a traceable decision record.
D. Repeat only the final step without checking the underlying inputs, records, or controls.
Correct Answer: C
Explanation: For Bearing, transmission, cable and control-system maintenance through, a defensible decision requires comparison
with the current criteria and evidence. Proceeding on assumption or verbal assurance would weaken quality control and
accountability.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 2
,4. A repeat check involving Inspection methods, corrosion control and defect recording with emphasis on boundaries and gives a
different result. What is the most appropriate response during a supervised practical activity? The result is within the usual range, but
5 required verification step(s) are not yet documented across 9 reviewed items.
A. Accept the result if it matches the expected outcome even though a required control check is invalid.
B. Report only the final indication and omit conditions that may have affected the result.
C. Hold the result, confirm that required test controls were satisfied, repeat the affected step when justified, and preserve full
traceability.
D. Use an expired or unverified reference because the expected difference is small.
Correct Answer: C
Explanation: The integrity of Inspection methods, corrosion control and defect recording with emphasis on depends on controlled test
conditions and complete records. An invalid control check must be resolved before a result is accepted.
5. Which step is most important when checking a calculation involving Human performance, foreign-object prevention and
independent checks for defensible calculations and during final verification before release or acceptance? A second reviewer checks
22 entries and identifies 6 unresolved differences that could affect the final decision.
A. Pause the dependent decision, reconcile changed inputs, recalculate using the current method, and obtain a second check for
critical results.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Proceed using an estimate even though current source data and the approved method are available.
D. Use the previous calculation unchanged even though one or more current inputs have changed.
Correct Answer: A
Explanation: Calculations for Human performance, foreign-object prevention and independent checks for depend on current data and
controlled assumptions. Reconciliation and a second check are appropriate before the result supports acceptance or release.
6. Which factor should receive the greatest attention when evaluating Aircraft jacking, towing, servicing and safe return to service
including recognition of abnormal or during pre-task planning? Operating conditions changed 4 hours ago, and a previous assumption
now differs from the current observation by 3%.
A. Verify the required limits, responsibilities, and supporting records, then close open issues before the next step is authorized.
B. Rely on verbal assurance from an experienced colleague instead of checking current evidence.
C. Continue using the previous accepted result because the earlier review was satisfactory.
D. Defer the unresolved point until the task is complete and document it later.
Correct Answer: A
Explanation: The best answer keeps Aircraft jacking, towing, servicing and safe return to service including tied to current requirements
and objective evidence. Resolving the discrepancy before acceptance preserves traceability and prevents an unsupported decision.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 3
, 7. Which communication practice best reduces misunderstanding involving Maintenance documentation, task cards and
approved-data control to support reliable, ethical during a field or operational inspection? The work is near completion when a
discrepancy is found in 2 of 48 records selected for acceptance review.
A. Use approved terminology or standard phraseology, obtain acknowledgement or read-back where required, and correct any
discrepancy immediately.
B. Proceed on the basis of an incomplete message and clarify details only if a problem occurs.
C. Use informal wording for critical information and omit required confirmation or read-back.
D. Delay communicating the discrepancy until the end of the shift so work is not interrupted.
Correct Answer: A
Explanation: For Maintenance documentation, task cards and approved-data control to support, approved communication methods,
acknowledgement, and read-back where required reduce ambiguity. Proceeding on an incomplete message creates avoidable
operational risk.
8. Which action best reduces the risk of a unit, input, or assumption error involving Equipment-function analysis, failure modes and
maintenance-strategy selection integrated across the during a routine quality-control review? The procedure is current, but the
observed condition differs from the documented baseline by 4% and affects 3 related items.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Adjust an input until the result falls within the target range and record only the final value.
C. Validate measurements and inputs, apply the approved calculation method, compare the result with required limits, and retain the
calculation record.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: C
Explanation: The safest numerical approach for Equipment-function analysis, failure modes and maintenance-strategy is to validate
source data and independently check the result before use. Selecting a favorable number without resolving differences is not
acceptable practice.
9. What should be verified first when a practitioner encounters uncertainty involving Bearings, shafts, couplings, gears, belts and
alignment principles within the aircraft maintenance during a shift or responsibility handover? Three independent observations are
available; the largest difference between them is 23%, and one required check remains incomplete.
A. Confirm the applicable criteria and current condition, investigate unresolved differences, and retain a traceable decision record.
B. Treat the issue as administrative and continue while the technical evidence remains unresolved.
C. Change the acceptance criterion to match the observed condition without formal authorization.
D. Repeat only the final step without checking the underlying inputs, records, or controls.
Correct Answer: A
Explanation: When Bearings, shafts, couplings, gears, belts and alignment principles within is uncertain, the practitioner should
investigate and document rather than bypass the control. This supports consistent, reviewable, and technically justified work.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 4
Module 7 Maintenance Practices
,1. Which action best supports a defensible test result for Wiring, connectors, bonding and electrical test technique with decisions and
evidence relevant to during a shift or responsibility handover? The responsible practitioner receives 11 observations from two
sources, with a 19% difference in the most critical value.
A. Compare the observed result with the governing procedure and acceptance standard, verify equipment and controls, and
document the conclusion.
B. Ignore equipment or environmental checks when the operator is experienced with the method.
C. Repeat the test until a passing result is obtained and discard inconsistent earlier results.
D. Change the sensitivity or acceptance limit without authorization to make the result easier to accept.
Correct Answer: A
Explanation: When repeated results for Wiring, connectors, bonding and electrical test technique with decisions differ, the correct
response is to investigate method and equipment factors rather than discard inconvenient evidence.
2. Which action best reduces the risk of a unit, input, or assumption error involving Sheet metal, composite, riveting and structural
repair fundamentals for safe, accurate work in during an incident or deviation follow-up? A sample of 24 items is examined; 3 show a
different condition, and the supporting record is 8 hours old.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Verify source data, units, assumptions, and limits; recalculate independently and document the checked result before using it.
C. Adjust an input until the result falls within the target range and record only the final value.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: B
Explanation: A result involving Sheet metal, composite, riveting and structural repair fundamentals for is only reliable when its inputs,
units, assumptions, and method are verified. An independent recalculation reduces the risk of carrying an unnoticed numerical error
into the decision.
3. What should a competent practitioner do before authorizing the next step involving Bearing, transmission, cable and control-system
maintenance through realistic aircraft maintenance during a technical documentation review? The field condition and the approved
record agree on most points, but 4 of 37 checked elements require reconciliation.
A. Treat the issue as administrative and continue while the technical evidence remains unresolved.
B. Change the acceptance criterion to match the observed condition without formal authorization.
C. Confirm the applicable criteria and current condition, investigate unresolved differences, and retain a traceable decision record.
D. Repeat only the final step without checking the underlying inputs, records, or controls.
Correct Answer: C
Explanation: For Bearing, transmission, cable and control-system maintenance through, a defensible decision requires comparison
with the current criteria and evidence. Proceeding on assumption or verbal assurance would weaken quality control and
accountability.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 2
,4. A repeat check involving Inspection methods, corrosion control and defect recording with emphasis on boundaries and gives a
different result. What is the most appropriate response during a supervised practical activity? The result is within the usual range, but
5 required verification step(s) are not yet documented across 9 reviewed items.
A. Accept the result if it matches the expected outcome even though a required control check is invalid.
B. Report only the final indication and omit conditions that may have affected the result.
C. Hold the result, confirm that required test controls were satisfied, repeat the affected step when justified, and preserve full
traceability.
D. Use an expired or unverified reference because the expected difference is small.
Correct Answer: C
Explanation: The integrity of Inspection methods, corrosion control and defect recording with emphasis on depends on controlled test
conditions and complete records. An invalid control check must be resolved before a result is accepted.
5. Which step is most important when checking a calculation involving Human performance, foreign-object prevention and
independent checks for defensible calculations and during final verification before release or acceptance? A second reviewer checks
22 entries and identifies 6 unresolved differences that could affect the final decision.
A. Pause the dependent decision, reconcile changed inputs, recalculate using the current method, and obtain a second check for
critical results.
B. Average conflicting results and accept the midpoint without checking the source data.
C. Proceed using an estimate even though current source data and the approved method are available.
D. Use the previous calculation unchanged even though one or more current inputs have changed.
Correct Answer: A
Explanation: Calculations for Human performance, foreign-object prevention and independent checks for depend on current data and
controlled assumptions. Reconciliation and a second check are appropriate before the result supports acceptance or release.
6. Which factor should receive the greatest attention when evaluating Aircraft jacking, towing, servicing and safe return to service
including recognition of abnormal or during pre-task planning? Operating conditions changed 4 hours ago, and a previous assumption
now differs from the current observation by 3%.
A. Verify the required limits, responsibilities, and supporting records, then close open issues before the next step is authorized.
B. Rely on verbal assurance from an experienced colleague instead of checking current evidence.
C. Continue using the previous accepted result because the earlier review was satisfactory.
D. Defer the unresolved point until the task is complete and document it later.
Correct Answer: A
Explanation: The best answer keeps Aircraft jacking, towing, servicing and safe return to service including tied to current requirements
and objective evidence. Resolving the discrepancy before acceptance preserves traceability and prevents an unsupported decision.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 3
, 7. Which communication practice best reduces misunderstanding involving Maintenance documentation, task cards and
approved-data control to support reliable, ethical during a field or operational inspection? The work is near completion when a
discrepancy is found in 2 of 48 records selected for acceptance review.
A. Use approved terminology or standard phraseology, obtain acknowledgement or read-back where required, and correct any
discrepancy immediately.
B. Proceed on the basis of an incomplete message and clarify details only if a problem occurs.
C. Use informal wording for critical information and omit required confirmation or read-back.
D. Delay communicating the discrepancy until the end of the shift so work is not interrupted.
Correct Answer: A
Explanation: For Maintenance documentation, task cards and approved-data control to support, approved communication methods,
acknowledgement, and read-back where required reduce ambiguity. Proceeding on an incomplete message creates avoidable
operational risk.
8. Which action best reduces the risk of a unit, input, or assumption error involving Equipment-function analysis, failure modes and
maintenance-strategy selection integrated across the during a routine quality-control review? The procedure is current, but the
observed condition differs from the documented baseline by 4% and affects 3 related items.
A. Select the most favorable result from repeated calculations without investigating the variation.
B. Adjust an input until the result falls within the target range and record only the final value.
C. Validate measurements and inputs, apply the approved calculation method, compare the result with required limits, and retain the
calculation record.
D. Ignore unit or assumption differences if the final number appears reasonable.
Correct Answer: C
Explanation: The safest numerical approach for Equipment-function analysis, failure modes and maintenance-strategy is to validate
source data and independently check the result before use. Selecting a favorable number without resolving differences is not
acceptable practice.
9. What should be verified first when a practitioner encounters uncertainty involving Bearings, shafts, couplings, gears, belts and
alignment principles within the aircraft maintenance during a shift or responsibility handover? Three independent observations are
available; the largest difference between them is 23%, and one required check remains incomplete.
A. Confirm the applicable criteria and current condition, investigate unresolved differences, and retain a traceable decision record.
B. Treat the issue as administrative and continue while the technical evidence remains unresolved.
C. Change the acceptance criterion to match the observed condition without formal authorization.
D. Repeat only the final step without checking the underlying inputs, records, or controls.
Correct Answer: A
Explanation: When Bearings, shafts, couplings, gears, belts and alignment principles within is uncertain, the practitioner should
investigate and document rather than bypass the control. This supports consistent, reviewable, and technically justified work.
Civil Aviation Authority Part-66 – Basic Exam Module 7 Maintenance Practices
Page 4
