AET Maintenance Procedures and Safety 3

Question 1

Under FAR Part 43, which task performed on an aircraft avionics system requires a Major Repair or Alteration form (FAA Form 337)?

Accepted Answer

Installing a new avionics system not previously approved for the aircraft

Answer

Installing a new avionics system not previously approved for the aircraft constitutes a major alteration requiring FAA Form 337.

Question 2

A technician is testing an aircraft transponder on the bench. What hazard does the transponder's RF output present?

Accepted Answer

Electromagnetic radiation hazard to personnel and potential interference with ATC

Answer

Active transponders emit RF energy that can cause electromagnetic radiation hazards to nearby personnel and interfere with ATC radar systems.

Question 3

When using a heat gun on aircraft wiring during shrink-tubing installation, the MOST important precaution is:

Accepted Answer

Keep the heat gun moving and avoid concentrating heat on one spot

Answer

Keeping the heat gun moving prevents localized overheating that could melt wire insulation or damage nearby components.

Question 4

What is the correct procedure when a technician accidentally drops a tool inside an aircraft during avionics maintenance?

Accepted Answer

Immediately stop work and retrieve the tool, documenting the event

Answer

A dropped tool must be immediately retrieved and the event documented, as a loose tool can jam flight controls or cause electrical hazards.

Question 5

Which OSHA standard primarily governs electrical safety for aviation maintenance technicians working on aircraft electrical systems?

Accepted Answer

OSHA 29 CFR 1910.147 – Control of Hazardous Energy (Lockout/Tagout)

Answer

OSHA 29 CFR 1910.147 (Lockout/Tagout) governs the control of hazardous energy during maintenance, directly applicable to aircraft electrical systems.

(AET) Aircraft Electronics Technician Practice Test