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
During an annual inspection, a mechanic discovers a 2-inch crack in the firewall. The CORRECT action is to:
Answer: Repair per the aircraft manufacturer's structural repair manual before returning to service
Firewall damage is a structural and fire-safety issue; repair must be accomplished per the manufacturer's SRM before the aircraft is returned to service.
A transponder mode C altitude readout displayed by ATC differs by 300 feet from the cockpit altimeter. The MOST likely cause is:
Answer: A failed altitude encoder calibration
A consistent altitude discrepancy between the encoder output and the cockpit altimeter indicates the altitude encoder needs calibration.
According to 14 CFR Part 43 Appendix D, which area is specifically required to be inspected during an annual or 100-hour inspection of the aircraft's fuel system?
Answer: Fuel tanks, fuel caps, vents, outlets, and fuel lines for leaks and condition
Appendix D specifically requires inspection of fuel tanks, caps, vents, outlets, and fuel lines for leaks and general condition.
An aircraft engine produces rough operation only on the left magneto during the runup magneto check. The MOST likely cause is:
Answer: One or more spark plugs assigned to the left magneto are fouled or failed
Rough running isolated to one magneto during the drop check most commonly indicates a fouled or failed spark plug on that magneto's circuit.
When inspecting a composite aircraft structure for delamination, the BEST initial field method is:
Answer: Tap testing with a coin or tap hammer listening for a change in sound
Tap testing (coin tap) is the standard initial field method for detecting delamination in composite structures by listening for a dull versus solid sound.
A fuel-injected aircraft engine experiences a sudden loss of power at cruise altitude with fuel flow remaining normal. The MOST likely cause is:
Answer: Induction air duct collapse or obstruction downstream of the air filter
Normal fuel flow with sudden power loss suggests adequate fuel delivery but restricted airflow, most likely from an induction duct collapse or obstruction.
When troubleshooting an aircraft's electric trim system that runs in only one direction, the FIRST component to check is:
Answer: The control switch contacts for the inoperative direction
A trim motor that operates in only one direction typically indicates a faulty switch contact for the non-functioning direction, as the motor itself is proven operational.