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

Replacing a like-for-like GPS antenna with the same part number

Answer

Cleaning and re-seating a connector on the autopilot

Answer

Performing a functional check of existing equipment

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

Risk of data corruption to nearby avionics

Answer

Fire risk from the antenna port

Answer

Damage to the bench power supply

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

Use only FAA-approved heat guns

Answer

Apply heat from the center outward

Answer

Disconnect the battery before applying heat

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

Complete the maintenance task first, then retrieve the tool

Answer

Note the tool's location and retrieve it during next access

Answer

Notify the pilot but continue maintenance

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 1910.303 – General Electrical Requirements

Answer

OSHA 29 CFR 1926.416 – Electrical Construction

Answer

OSHA 29 CFR 1910.269 – Electric Power Generation

Question 6

After completing avionics maintenance, a technician notices the aircraft skin has several small scratches near the avionics bay access panel. The CORRECT action is to:

Accepted Answer

Document the damage in the maintenance record and defer to sheet metal inspection

Answer

Polish the scratches with abrasive compound and return to service

Answer

Ignore scratches smaller than 1/8 inch

Answer

Apply touch-up paint immediately to prevent corrosion

Question 7

What is the purpose of using a 'dummy load' when testing an aircraft radio transmitter on the bench?

Accepted Answer

To simulate antenna impedance and prevent unauthorized RF emissions

Answer

To boost the transmitter's output power for testing

Answer

To protect the bench test equipment from DC voltage spikes

Answer

To simulate cockpit audio panel loading