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M49461
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 CAUTION:_______ MAKE SURE THE MANUAL DRIVE IS FULLY ENGAGED WITH THE SYNC LOCK
 DRIVE SHAFT BEFORE YOU TURN IT.  DO NOT USE FORCE TO ENGAGE THE
 MANUAL DRIVE.  ALSO, MAKE SURE THE MANUAL DRIVE STAYS FULLY
 ENGAGED WHILE YOU OPERATE THE SQUARE DRIVE.  IF THE MANUAL
 DRIVE IS NOT FULLY ENGAGED OR IF YOU USE FORCE TO ENGAGE IT,

 DAMAGE TO THE SYNC LOCK CAN OCCUR.
 (3)  Install a 3/8 inch square drive into the end of the manual drive on the sync lock.
 NOTE: You must push the square drive in until it stops and hold it
____ there to manually disengage the synch lock and engage the manual drive shaft.
 Small position adjustments of the manual drive may be necessary to align it with the sync lock drive shaft. If you can not install the 3/8 inch square drive, use a 5/8 inch hex drive on the outer hex nut and turn counterclockwise and clockwise a very small amount.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 862-084-N00

 WARNING:_______ MAKE SURE ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE THRUST
 REVERSER AND THE ADJACENT AREA.  IF YOU DO NOT OBEY THIS
 INSTRUCTION, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN
 OCCUR WHEN THE THRUST REVERSER IS RETRACTED.
 CAUTION:_______ MAKE SURE ALL THE ACTUATORS OPERATE CORRECTLY WHEN YOU RETRACT
 THE THRUST REVERSER.  IF THE FLEXSHAFT BETWEEN THE ACTUATORS IS
 BROKEN, OR IS NOT INSTALLED, ONLY THE BOTTOM ACTUATOR WILL
 OPERATE.  IF YOU CONTINUE TO OPERATE THE THRUST REVERSER WITH

 THIS CONDITION, DAMAGE TO THE THRUST REVERSER CAN OCCUR.
 (4)  While you keep the sync lock disengaged, turn the square drive to fully retract the applicable thrust reverser sleeve.
 NOTE: Make sure you turn the square drive in the direction that
____ retracts the thrust reverser sleeve. For the left sleeve, turn the manual drive clockwise. For the right sleeve, turn the manual drive counterclockwise.
 Make sure the manual drive turns smoothly. If it does not turn smoothly, stop the manual operation and install the square drive again. If the manual drive continues to operate roughly, use the power method to retract the thrust reverser sleeve. Also, the manual drive has a clutch to make sure you do not apply too much torque. If you hear clicks before the thrust reverser sleeve is fully retracted, and the rod end clearance for the center locking actuator is more than 0.100 inch, use the power method to retract the thrust reverser sleeve (AMM 78-31-00/201).
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 (5)  Remove the square drive from the end of the manual drive on the sync lock.
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 (6)  To make sure the thrust reverser sleeve is in the fully stowed position, measure the rod end clearance for the center locking actuator.
 NOTE: If you used the power method to retract the thrust reverser
____ sleeve, measure the rod end clearance after the hydraulic power is removed.
 (a)  The rod end clearance for the center locking actuator must not be more than 0.100 inch with the hydraulic power removed.
 S 862-087-N00
 (7)  
If it is necessary, do the steps (above) to retract the opposite thrust reverser sleeve.

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 (8)  
Do this task: "Thrust Reverser Activation After Ground Maintenance"
　
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