Airframe Systems & Structural Maintenance Flashcards
7 cards from real ACS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Airframe Systems & Structural Maintenance flashcards as text
When inspecting a riveted skin joint, you find a rivet with a shop head that is too small. What is the correct corrective action?
Answer: Drill out and replace with the same diameter rivet driven correctly
An undersized shop head indicates improper driving; the rivet must be drilled out and replaced using correct driving technique with the same specification rivet.
Which type of structural damage is classified as 'negligible' and requires no repair according to the aircraft SRM?
Answer: Minor scratches or nicks that do not exceed allowable depth limits
Negligible damage is surface damage within manufacturer-specified allowable limits that does not affect structural integrity and requires no repair.
What is the primary purpose of a drain hole in an aircraft control surface?
Answer: To prevent moisture accumulation that can cause corrosion and balance issues
Drain holes prevent moisture buildup inside control surfaces, which can cause corrosion and shift the balance of the surface, affecting flight characteristics.
When performing a repair to aircraft fabric covering using the brush method, the fabric patches should overlap the damaged area by a minimum of:
Answer: 2 inches on all sides
FAA AC 43.13-1B specifies that fabric patches must overlap the undamaged fabric by at least 2 inches on all sides to ensure adequate adhesion and strength.
A fuselage frame made of 4130 steel tubing has a crack in a non-primary member. Which welding rod is most appropriate for repair?
Answer: ER70S-2
ER70S-2 is the correct TIG welding rod for 4130 chromoly steel airframe tubing repairs, providing compatible strength and weld characteristics.
What condition is indicated when aircraft skin shows 'oil canning' between stringers?
Answer: The skin has buckled due to compression stress exceeding its stability limit
Oil canning is a visible buckling of thin metal skin between stringers caused by compression loads exceeding the skin's local buckling stability, and it must be evaluated per the SRM.
During a landing gear retraction test, the gear takes longer than the published time to retract. What is the FIRST area to check?
Answer: Hydraulic system fluid level and accumulator pressure
Low hydraulic fluid level or insufficient accumulator pressure is the most common and easily checked cause of slow gear retraction before investigating actuators or rigging.