Inspection & Quality Control Flashcards

What is the significance of a 'Critical Design Configuration Control Limitation' (CDCCL) in aircraft maintenance documentation?

Answer: It identifies configurations that must be maintained to prevent fuel tank ignition sources

CDCCLs are specifically designed to maintain fuel tank safety by controlling configurations that could introduce ignition sources, established after TWA 800.

During ultrasonic thickness testing of an aircraft skin panel, the instrument reading shows a value below the minimum allowable thickness. The technician should:

Answer: Remove the panel from service and replace or repair per manufacturer data

A below-minimum thickness reading means the part is unairworthy; it must be removed from service and dispositioned per manufacturer repair data before return to service.

Under 14 CFR Part 43, who is responsible for ensuring that a completed maintenance record entry is accurate, legible, and complete?

Answer: The person who performed or supervised the work and approved the return to service

14 CFR 43.9 requires the person approving the work for return to service to make an entry that includes a description, date, and their certificate number.

What condition does 'intergranular corrosion' specifically affect in aluminum aircraft structure?

Answer: The grain boundaries within the metal, weakening it from the inside

Intergranular corrosion attacks along grain boundaries of the alloy, reducing structural strength significantly while often showing minimal surface evidence.

A repair station's inspector rejects a repaired component. The production department disagrees with the rejection. Who has final authority over the airworthiness determination?

Answer: The Quality Control department

Quality Control maintains independence and final authority over airworthiness decisions; production cannot override an inspector's rejection under Part 145.

Which record must be retained for the life of an aircraft, as required by 14 CFR 91.419?

Answer: Records of current status of applicable ADs and the total time in service of the airframe

14 CFR 91.419(b) requires life-of-aircraft retention for AD compliance status and total time in service of the airframe, engines, propellers, and rotors.

A liquid penetrant inspection is being performed on a steel landing gear fitting. After the developer is applied and the dwell time has elapsed, the technician sees a faint pink indication. This indicates:

Answer: A surface discontinuity that requires further evaluation against applicable limits

Any indication from dye penetrant represents trapped penetrant from a surface discontinuity and must be evaluated against the applicable acceptance criteria.