FAA Aviation Mechanic Airframe (AMA)Fuel, Cabin and Ice Control SystemsMedium
A pilot of a light aircraft not equipped with automatic ice detection uses a small light mounted on the fuselage to check the wing leading edge during a night flight in visible moisture. What is the purpose of this device?
- ATo electrically heat the leading edge and prevent ice formation
- BTo indicate that the pneumatic deicer boots have fully deflated
- CTo warn the crew of an electrostatic discharge hazard on the wing
- DTo allow the flight crew to visually inspect the wing leading edge for ice accumulation
Show answer & explanationAnswer & explanation
Correct answer: D. To allow the flight crew to visually inspect the wing leading edge for ice accumulation
A wing ice inspection light is simply an illumination device, often mounted on the fuselage or wing root, aimed at the leading edge so the flight crew can visually monitor for ice accretion at night; it provides no heating or automatic detection function itself.
Why the other options are wrong
- A. Heating the leading edge is done by anti-ice systems (electrothermal or hot air), not a light.
- B. Deicer boot deflation is monitored by pressure or distributor valve indications, not a light.
- C. Static discharge is unrelated to this lighting device.
Wing Ice Inspection Light
A light fixture aimed at the wing leading edge to allow the flight crew to visually check for ice buildup during night operations.
- Provides illumination only, no heating
- Used on aircraft lacking automatic ice detectors
- Mounted on fuselage or wing to shine on leading edge
Memory trick: 'Ice light just lets the pilot LOOK, not COOK.'