AVIT 428 TEST 1 EXAM – QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
1. According to 14 CFR Part 43, who is authorized to approve an aircraft for return
to service after a major repair?
A. An FAA-certified repair station with a limited rating
B. A private pilot with a current medical certificate
C. An appropriately rated FAA-certificated mechanic
D. An aircraft owner with a valid pilot's license
🟢 C. An appropriately rated FAA-certificated mechanic
🔴 Explanation: 14 CFR Part 43 outlines the rules for maintenance, preventive
maintenance, rebuilding, and alteration. Specifically, an appropriately rated FAA-
certificated mechanic (holding an Airframe and Powerplant rating, with relevant
inspection authorization if required) is authorized to return an aircraft to service after a
major repair, provided they have the necessary experience and the work is performed in
accordance with approved technical data.
2. An aircraft's pitot-static system is being tested. The static system is found to
have a leak. Which of the following aircraft instruments would be MOST directly
affected by this malfunction?
A. Altimeter and Vertical Speed Indicator (VSI)
B. Magnetic Compass and Turn Coordinator
C. Airspeed Indicator and Tachometer
D. Oil Pressure Gauge and Manifold Pressure Gauge
🟢 A. Altimeter and Vertical Speed Indicator (VSI)
🔴 Explanation: The altimeter and VSI are both directly connected to the static pressure
system. A leak in the static system will cause these instruments to provide erroneous
readings. The airspeed indicator also uses static pressure, but its primary input is from
pitot pressure; however, a static leak will affect all static-dependent instruments, with the
altimeter and VSI being the most directly impacted as they are solely reliant on static
pressure.
3. Which of the following is the PRIMARY purpose of an Aircraft Maintenance
Manual (AMM)?
A. To provide a list of approved replacement parts
B. To serve as a comprehensive guide for all maintenance and repair procedures
C. To contain the airworthiness directives for the specific aircraft
,D. To outline the pilot's operating procedures in emergency situations
🟢 B. To serve as a comprehensive guide for all maintenance and repair procedures
🔴 Explanation: The Aircraft Maintenance Manual is the primary, comprehensive document
for all scheduled and unscheduled maintenance, repair, and overhaul procedures. It
provides detailed instructions, tools required, and specifications for performing work on the
airframe, powerplant, and systems. While other documents provide part lists, ADs, or pilot
information, the AMM is the central reference for maintenance actions.
4. In the context of human factors in aviation maintenance, what does the term
"complacency" most directly describe?
A. A heightened state of awareness and focus on the task
B. A state of self-satisfaction that can lead to overlooking potential errors
C. The physical and mental exhaustion resulting from long work hours
D. A deliberate violation of safety rules to expedite a task
🟢 B. A state of self-satisfaction that can lead to overlooking potential errors
🔴 Explanation: Complacency is a psychological state where a person is so confident in
their abilities or the routine nature of a task that they become less vigilant. This leads to a
reduced ability to perceive or react to errors, making it a significant human factor hazard
in maintenance where repetitive tasks are common.
5. Which document is a legally enforceable rule issued by the FAA that mandates a
specific action to correct an unsafe condition in an aircraft product?
A. Advisory Circular (AC)
B. Airworthiness Directive (AD)
C. Notice of Proposed Rulemaking (NPRM)
D. Supplemental Type Certificate (STC)
🟢 B. Airworthiness Directive (AD)
🔴 Explanation: Airworthiness Directives are legally binding rules issued by the FAA under
14 CFR Part 39. They are promulgated when an unsafe condition exists in a product
(aircraft, engine, propeller, or appliance) and the condition is likely to exist or develop in
other products of the same type design. ADs mandate corrective actions, such as
inspections or modifications.
6. While performing a 100-hour inspection, a mechanic discovers that a control
cable is frayed but is still within the manufacturer's wear limits. According to
standard practices, the mechanic should:
A. Apply a light coat of grease to prevent further fraying.
B. Mark the location for monitoring and document the finding in the logbook.
C. Immediately replace the cable as a precautionary measure.
D. Leave it, as it is within acceptable limits.
🟢 B. Mark the location for monitoring and document the finding in the logbook.
, 🔴 Explanation: While the cable is technically airworthy, a finding of fraying, even if within
limits, should be documented. The mechanic should mark the location to allow for easy
monitoring during future inspections and make a logbook entry detailing the finding and
its location. This demonstrates sound professional practice and due diligence.
7. When an aircraft is on a jack, which of the following is the MOST critical safety
consideration?
A. Ensuring the landing gear doors are closed
B. Attaching a grounding wire to prevent sparks
C. Ensuring the aircraft is properly leveled
D. Checking the condition of the pitot-static system
🟢 B. Attaching a grounding wire to prevent sparks
🔴 Explanation: While leveling is important for certain maintenance tasks, the most critical
safety concern when an aircraft is on jacks is the risk of fire or explosion from static
electricity. Attaching a grounding wire, often connected to the aircraft's grounding point
and a designated ground, safely dissipates static charge, preventing sparks that could
ignite fuel vapors or other flammable materials.
8. What is the primary function of a centrifugal switch in an aircraft starter motor?
A. To engage the starter motor to the flywheel
B. To disconnect the starter motor at a predetermined RPM
C. To regulate the voltage supplied to the starter
D. To reverse the direction of the starter motor's rotation
🟢 B. To disconnect the starter motor at a predetermined RPM
🔴 Explanation: The centrifugal switch in a starter motor is a safety and operational device.
It senses the rotational speed of the starter armature. When the engine starts and the
starter is being back-driven, the centrifugal force causes the switch to open, disconnecting
the starter from the electrical circuit. This prevents the starter motor from being oversped
and damaged by the engine.
9. Which of the following best defines the concept of "Maintenance Error" in
aviation?
A. An unintentional deviation from an accepted standard or procedure
B. A deliberate deviation from an accepted standard or procedure
C. The failure of a component due to material fatigue
D. An act of sabotage against the aircraft or its systems
🟢 A. An unintentional deviation from an accepted standard or procedure
🔴 Explanation: In aviation safety, a maintenance error is specifically defined as an
unintentional deviation from a standard, rule, or procedure that is acceptable within the
system. This is distinct from a violation, which is a deliberate act. Errors are often the result
of human factors like fatigue, distraction, or lack of knowledge.
VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
1. According to 14 CFR Part 43, who is authorized to approve an aircraft for return
to service after a major repair?
A. An FAA-certified repair station with a limited rating
B. A private pilot with a current medical certificate
C. An appropriately rated FAA-certificated mechanic
D. An aircraft owner with a valid pilot's license
🟢 C. An appropriately rated FAA-certificated mechanic
🔴 Explanation: 14 CFR Part 43 outlines the rules for maintenance, preventive
maintenance, rebuilding, and alteration. Specifically, an appropriately rated FAA-
certificated mechanic (holding an Airframe and Powerplant rating, with relevant
inspection authorization if required) is authorized to return an aircraft to service after a
major repair, provided they have the necessary experience and the work is performed in
accordance with approved technical data.
2. An aircraft's pitot-static system is being tested. The static system is found to
have a leak. Which of the following aircraft instruments would be MOST directly
affected by this malfunction?
A. Altimeter and Vertical Speed Indicator (VSI)
B. Magnetic Compass and Turn Coordinator
C. Airspeed Indicator and Tachometer
D. Oil Pressure Gauge and Manifold Pressure Gauge
🟢 A. Altimeter and Vertical Speed Indicator (VSI)
🔴 Explanation: The altimeter and VSI are both directly connected to the static pressure
system. A leak in the static system will cause these instruments to provide erroneous
readings. The airspeed indicator also uses static pressure, but its primary input is from
pitot pressure; however, a static leak will affect all static-dependent instruments, with the
altimeter and VSI being the most directly impacted as they are solely reliant on static
pressure.
3. Which of the following is the PRIMARY purpose of an Aircraft Maintenance
Manual (AMM)?
A. To provide a list of approved replacement parts
B. To serve as a comprehensive guide for all maintenance and repair procedures
C. To contain the airworthiness directives for the specific aircraft
,D. To outline the pilot's operating procedures in emergency situations
🟢 B. To serve as a comprehensive guide for all maintenance and repair procedures
🔴 Explanation: The Aircraft Maintenance Manual is the primary, comprehensive document
for all scheduled and unscheduled maintenance, repair, and overhaul procedures. It
provides detailed instructions, tools required, and specifications for performing work on the
airframe, powerplant, and systems. While other documents provide part lists, ADs, or pilot
information, the AMM is the central reference for maintenance actions.
4. In the context of human factors in aviation maintenance, what does the term
"complacency" most directly describe?
A. A heightened state of awareness and focus on the task
B. A state of self-satisfaction that can lead to overlooking potential errors
C. The physical and mental exhaustion resulting from long work hours
D. A deliberate violation of safety rules to expedite a task
🟢 B. A state of self-satisfaction that can lead to overlooking potential errors
🔴 Explanation: Complacency is a psychological state where a person is so confident in
their abilities or the routine nature of a task that they become less vigilant. This leads to a
reduced ability to perceive or react to errors, making it a significant human factor hazard
in maintenance where repetitive tasks are common.
5. Which document is a legally enforceable rule issued by the FAA that mandates a
specific action to correct an unsafe condition in an aircraft product?
A. Advisory Circular (AC)
B. Airworthiness Directive (AD)
C. Notice of Proposed Rulemaking (NPRM)
D. Supplemental Type Certificate (STC)
🟢 B. Airworthiness Directive (AD)
🔴 Explanation: Airworthiness Directives are legally binding rules issued by the FAA under
14 CFR Part 39. They are promulgated when an unsafe condition exists in a product
(aircraft, engine, propeller, or appliance) and the condition is likely to exist or develop in
other products of the same type design. ADs mandate corrective actions, such as
inspections or modifications.
6. While performing a 100-hour inspection, a mechanic discovers that a control
cable is frayed but is still within the manufacturer's wear limits. According to
standard practices, the mechanic should:
A. Apply a light coat of grease to prevent further fraying.
B. Mark the location for monitoring and document the finding in the logbook.
C. Immediately replace the cable as a precautionary measure.
D. Leave it, as it is within acceptable limits.
🟢 B. Mark the location for monitoring and document the finding in the logbook.
, 🔴 Explanation: While the cable is technically airworthy, a finding of fraying, even if within
limits, should be documented. The mechanic should mark the location to allow for easy
monitoring during future inspections and make a logbook entry detailing the finding and
its location. This demonstrates sound professional practice and due diligence.
7. When an aircraft is on a jack, which of the following is the MOST critical safety
consideration?
A. Ensuring the landing gear doors are closed
B. Attaching a grounding wire to prevent sparks
C. Ensuring the aircraft is properly leveled
D. Checking the condition of the pitot-static system
🟢 B. Attaching a grounding wire to prevent sparks
🔴 Explanation: While leveling is important for certain maintenance tasks, the most critical
safety concern when an aircraft is on jacks is the risk of fire or explosion from static
electricity. Attaching a grounding wire, often connected to the aircraft's grounding point
and a designated ground, safely dissipates static charge, preventing sparks that could
ignite fuel vapors or other flammable materials.
8. What is the primary function of a centrifugal switch in an aircraft starter motor?
A. To engage the starter motor to the flywheel
B. To disconnect the starter motor at a predetermined RPM
C. To regulate the voltage supplied to the starter
D. To reverse the direction of the starter motor's rotation
🟢 B. To disconnect the starter motor at a predetermined RPM
🔴 Explanation: The centrifugal switch in a starter motor is a safety and operational device.
It senses the rotational speed of the starter armature. When the engine starts and the
starter is being back-driven, the centrifugal force causes the switch to open, disconnecting
the starter from the electrical circuit. This prevents the starter motor from being oversped
and damaged by the engine.
9. Which of the following best defines the concept of "Maintenance Error" in
aviation?
A. An unintentional deviation from an accepted standard or procedure
B. A deliberate deviation from an accepted standard or procedure
C. The failure of a component due to material fatigue
D. An act of sabotage against the aircraft or its systems
🟢 A. An unintentional deviation from an accepted standard or procedure
🔴 Explanation: In aviation safety, a maintenance error is specifically defined as an
unintentional deviation from a standard, rule, or procedure that is acceptable within the
system. This is distinct from a violation, which is a deliberate act. Errors are often the result
of human factors like fatigue, distraction, or lack of knowledge.
