Engine & Powerplant Inspection Procedures Flashcards
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Read the first 6 Engine & Powerplant Inspection Procedures flashcards as text
During an annual, what inspection is typically performed on a constant-speed propeller?
Answer: Pitch setting verification and governor operational check
An annual inspection of a constant-speed propeller includes verifying pitch range, checking the governor for proper RPM control, and inspecting for damage and leaks.
What is a common indicator of a failing engine mount that an IA would identify during an annual?
Answer: Cracks, rust through, or separation of rubber isolator mounts
Cracked steel tubes, corroded welds, or deteriorated rubber isolators in the engine mount compromise structural integrity and must be corrected before return to service.
Which of the following is checked during an inspection of a fuel-injected engine's fuel distribution system?
Answer: Injector nozzle orifice size and flow equalization among cylinders
Fuel-injected engines require verification that injector nozzles are clean and that fuel flow is equalized across all cylinders for proper mixture distribution.
What is the purpose of the oil dilution system check during a cold-weather annual inspection?
Answer: To verify that fuel can be injected into the oil system for easier cold starts
The oil dilution system adds fuel to the oil before shutdown to reduce viscosity in cold temperatures, and its function is verified to ensure it will ease cold-weather starts.
When inspecting a piston engine's ignition harness during an annual, what defect requires replacement?
Answer: Cracked, chafed, or deteriorated insulation that could cause arcing or misfires
Compromised insulation on ignition leads can cause high-voltage arcing, misfires, or engine roughness and is an airworthiness defect requiring correction.
What must an IA confirm about an engine's time-since-overhaul (TSO) and time between overhaul (TBO) during an annual inspection?
Answer: Whether the aircraft is operated under Part 91, where TBO is a manufacturer recommendation, or Part 135, where it may be mandatory
Under Part 91, TBO is a manufacturer recommendation, not a regulatory requirement, while Part 135 and other commercial operations may require mandatory compliance.
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