Inlet Suction
Suction at the inlet of an engine can pull objects, including a person, into the engine. The inlet hazard areas increase in size as the engine power level increases from minimum idle power, to breakaway power, to takeoff power. When you operate two engines, the hazard area is the sum of the left and right hazard areas.
The inlet hazard areas for the PW4000 series engine on the 777 are the not same as other engines from other engine manufacturers.
NOTE: If surface wind is more than 25 knots, increase the inlet hazard area by 20%.
Engine damage can result when rags, eyeglasses, hats, or other loose objects go into the inlet cowl. You must attach or remove any loose objects before you work around the engine.
Heat
The engine exhaust temperature can remain high for a long distance behind the engine.
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POWER PLANT -ENGINE HAZARD AREAS
The engine develops high speed exhaust that can cause injury to personnel and damage to equipment. The exhaust hazard areas increase in size as the engine power level increases from minimum idle power, to breakaway power, to takeoff power. When you operate two engines, the hazard area is the sum of the left and right hazard areas.
The exhaust hazard areas for the PW4000 series engine on the 777 are the not same as other engines from other engine manufacturers.
In these exhaust hazard areas, the high speed exhaust has been shown to lift and overturn a large service truck, end over end for several hundred feet. Loose paving material on the ramp and loose objects can become projectiles in the high speed exhaust.
The fan exhaust moves forward when the thrust reverser deploys. The reverse thrust hazard area extends ahead of the airplane.
Noise
Engine noise can cause temporary and permanent hearing loss. You must wear cup-type ear protection near an engine in operation.
WARNING: LONG EXPOSURES TO JET ENGINE NOISE CAN CAUSE HEARING DAMAGE EVEN WHEN YOU WEAR EAR PROTECTION.
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PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
POWER PLANT -ENGINE INLET HAZARD AREAS
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PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
POWER PLANT -ENGINE EXHAUST HAZARD AREAS
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PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
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