PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
TRAS -THRUST REVERSER DEACTIVATION
EFFECTIVITY BEJ ALL 78-34-00
Page 57
D633W101-BEJ May 05/2003
TRAS -MANUAL EXTENSION/RETRACTION FOR MAINTENANCE
General
Manual operation permits you to move one thrust reverser sleeve at a time. To move each thrust reverser sleeve manually, you must unlock the related two locking actuators and the sync lock/manual drive unit. You also open the bypass valve in the isolation valve.
Extend/Retract
This is an overview of the procedure to manually extend the thrust reverser sleeves:
*
Deactivate the isolation valve (IV). (See the section on T/R deactivation for more information.)
*
Move the bypass valve handle on the isolation valve (IV) so it aligns with the clevis. Install a pin. This keeps the bypass valve open.
*
Release the locks on the center actuator, lower actuator, and sync lock/manual drive unit (SL). Push the lock pins in to keep the locks released.
*
Use a 3/8 inch square drive on the sync lock/manual drive unit to extend the thrust reverser sleeve.
NOTE: The bypass valve must be open before you manually extend or retract the thrust reverser sleeve. This will prevent a hydraulic lock, which can prevent movement of the thrust reverser sleeve. But, you must close the bypass valve if you remove thrust reverser components or hydraulic tubing. If you do not close the bypass valve, leakage of the hydraulic fluid from the reservoir will occur when you remove the components or tubing.
NOTE: You must push and hold the 3/8 inch drive in while you turn the manual drive unit. A clutch in the manual drive unit prevents damage to the sync shaft system.
To manually retract the thrust reverser sleeve, do the procedure in the reverse order.
EFFECTIVITY BEJ ALL 78-34-00
Page 58
D633W101-BEJ May 05/2003
TRAS -MANUAL EXTENSION/RETRACTION FOR MAINTENANCE
EFFECTIVITY BEJ ALL 78-34-00
Page 59
D633W101-BEJ May 05/2003
PW4000 SERIES ENGINES
777 AIRCRAFT MAINTENANCE MANUAL
THIS PAGE IS INTENTIONALLY LEFT BLANK
78-36-00
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D633W101-BEJ Sep 05/2002
BOEING PROPRIETARY -Copyright # -Unpublished Work -See title page for details.
THRUST REVERSER (T/R) INDICATING AND FAULT DETECTION -INTRODUCTION
Purpose
The T/R indicating and fault detection system supplies data for these functions:
*
Extend and retract control
*
Flight deck indication
*
Failure detection.
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