FAA Aviation Mechanic General (AMG)Ground Operations and ServicingHard
A technician must perform an engine ground run-up on a turbine-powered transport aircraft. To avoid personnel being ingested or injured, which hazard area is of GREATEST concern directly in front of and close to the engine intake during high power settings?
- AThe propeller arc danger zone near the spinner
- BThe static electricity hazard from fuel vapor near the intake
- CThe intake suction hazard zone that can pull a person into the engine
- DThe jet blast hazard area extending behind the engine exhaust
Show answer & explanationAnswer & explanation
Correct answer: C. The intake suction hazard zone that can pull a person into the engine
Turbine engine intakes create powerful suction (FOD/intake danger zone) that can pull loose objects, clothing, or even personnel into the engine at high power settings; ground crews must stay clear of this forward intake hazard area per the aircraft's ground safety diagram. Jet blast is a hazard behind the engine, not in front, and propeller hazards apply to piston/turboprop aircraft, not turbofan intakes.
Why the other options are wrong
- A. Propeller arc hazards apply to propeller-driven aircraft, not turbine intakes.
- B. Static electricity from fuel vapor is not the primary intake hazard during run-up.
- D. Jet blast is a hazard aft of the engine exhaust, not at the intake.
Turbine Engine Intake Hazard
The area forward of a running turbine engine where suction can ingest loose objects, tools, or personnel, causing FOD or injury.
- Danger zone distance varies by engine size and power setting
- Personnel and loose equipment must stay clear of marked intake hazard areas
- Jet blast danger zone is aft of the exhaust, opposite of intake hazard
Memory trick: Front sucks, back blows — know your zones before you go.