Aircraft Maintenance Inspection & Troubleshooting Flashcards
7 cards from real AM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aircraft Maintenance Inspection & Troubleshooting flashcards as text
An aircraft is returned for recurring nose-wheel shimmy. After replacing the shimmy damper with a serviceable unit, shimmy recurs immediately. The NEXT step is to inspect:
Answer: Nose gear fork bolt torque and wheel bearing preload
Recurring shimmy after damper replacement indicates the root cause is mechanical looseness, most commonly excessive wheel bearing play or loose gear fork bolt torque.
During inspection of an aircraft battery, the electrolyte level in a lead-acid battery is found to be below the plates. The correct action is to:
Answer: Add distilled water to the correct level and charge the battery
Only distilled water should be added to a lead-acid battery to restore electrolyte level, followed by a charge to mix the electrolyte.
An Airworthiness Directive (AD) requires a one-time inspection. The AD compliance is documented in the aircraft records and the inspection is complete. The mechanic's NEXT required action regarding this AD is:
Answer: No further action required — a one-time AD is complete after first compliance
A one-time AD requires no further recurring action once the required inspection or repair is performed and documented.
When performing a rigging check on an aircraft's ailerons, the LEFT aileron is found to be 2° high and the RIGHT aileron is 2° low with the control wheel centered. This indicates:
Answer: Asymmetric cable tension or a turnbuckle adjustment discrepancy in the aileron cable system
Equal but opposite aileron displacement from neutral indicates unequal cable tension or a turnbuckle adjustment discrepancy causing the system to be off-center.
During an ELT inspection, the mechanic finds the battery expiration date has passed. According to 14 CFR 91.207, the required action is to:
Answer: Replace the battery before further flight
14 CFR 91.207 requires the ELT battery to be replaced and the aircraft is not airworthy with an expired ELT battery.
A differential pressure check on an aircraft cylinder reveals 58/80. What does this result indicate?
Answer: The cylinder is likely unserviceable depending on the manufacturer's limits, and further inspection is needed to identify the source of leakage
A 58/80 reading means 22 psi leakage; whether it is acceptable depends on manufacturer limits, and the leakage source (rings, valves, or case) must be identified.
After completing a major repair on an aircraft structure, the mechanic must return the aircraft to airworthy status by:
Answer: Completing FAA Form 337 and obtaining approval for return to service per 14 CFR Part 43.9
Major repairs must be documented on FAA Form 337 and the aircraft returned to service per the requirements of 14 CFR Part 43.9.