Use ground support equipment when you remove or install these components.
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PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
ENGINE COWLING -TURBINE EXHAUST
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ENGINE COWLING -FAN COWL LATCH ADJUSTMENT -TRAINING INFORMATION POINTS
The correct adjustment of fan cowl panel latches supplies a smooth airflow over the engine cowling. A latch with the correct adjustment closes with a loud pop noise.
You adjust the thrust reverser latches before you adjust the fan cowl panel latches. You adjust the fan cowl panel latches with the thrust reverser halves closed and latched. You adjust the fan cowl panel latches when you replace any of these components:
*
Engine
*
Fan cowl panel
*
Fan cowl panel latches
*
Thrust reverser.
Fan Cowl Panel Latch Adjustment
You adjust the four fan cowl panel latches when you find the split line gap or the closing force of the latches is incorrect. The shims set the width of the split line gap between the fan cowl panels.
You adjust the closing force of the latches by changing the position of the keeper. Adjust the latches from forward to aft.
You change the position of the latch keepers by turning the adjustment star. Use an allen wrench to turn the adjustment star. The allen wrench goes through a slot in the fan cowl panel.
CAUTION: DO NOT APPLY A FORCE OF MORE THAN 60 POUNDS (27 KGS) TO THE LATCH HANDLE. IF YOU APPLY TOO MUCH FORCE, YOU CAN CAUSE DAMAGE TO THE LATCH.
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ENGINE COWLING -FAN COWL LATCH ADJUSTMENT -TRAINING INFORMATION POINTS
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ENGINE COWLING -THRUST REVERSER LATCH ADJUSTMENT -TRAINING INFORMATION POINTS
There are 13 latches which hold the thrust reverser (T/R) halves together. You adjust the tension of the v-band latch first. You then adjust the remaining latches from forward to aft with the v-band latch closed.
V-Band Latch Adjustment
The v-band latch holds the leading edge of the T/R halves together. You measure the force necessary to close the v-band latch with a spring scale. If the force is not in the limits, you adjust the T-bolt until the closing force is in the limits.
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