THRUST REVERSER ASSEMBLY - REMOVAL/INSTALLATION
1. General
A. The thrust reverser is attached to the tailpipe extension aft mounting flange with 42 bolts. The tailpipe extension forward mounting flange is attached to the engine. The reverser is removed and installed at the tailpipe extension aft mounting flange by disconnecting the necessary plumbing and removing the installation bolts. Access to the installation bolts is gained by removing the tailpipe fairings.
B. For thrust reverser exhaust nozzle configuration and installation refer to step 5.
2. Equipment and Materials
CAUTION: DO NOT USE CADMIUM-PLATED TOOLS ON TITANIUM COMPONENTS WHICH ARE SUBJECTED TO HIGH TEMPERATURES. CADMIUM REACTS WITH TITANIUM AT HIGH TEMPERATURES AND MAY CAUSE EMBRITTLEMENT AND CRACKS IN TITANIUM PARTS.
A. Antiseize Compound -Ease-Off 990, Texacone Corp., Dallas, Texas 75207 or equivalent
B. Cart Assembly - F80101 or equivalent
C. Sling Assembly - F80110-1 or equivalent
D. Thrust Reverser Isolation Valve Ground Lock Cap and Pin Assembly - F80109-3 or F80109-9 or equivalent
3. Prepare for Removal
A. Check that thrust reverser deflector doors are stowed and locked.
B. Examine exposed area of exhaust nozzle. Refer to thrust reverser assembly inspection/check for exhaust nozzle crack limitations.
C. Deactivate thrust reverser hydraulic system by inserting ground locking pins in both thrust reverser isolation valves, installing thrust reverser lever lock, P/N 137-7006, on both thrust reverser lever quadrants, pulling both THRUST REVERSER circuit breakers and attaching DO NOT OPERATE tags.
WARNING: SERIOUS INJURY CAN RESULT TO PERSONNEL IF GROUND LOCKS ARE NOT PROPERLY INSTALLED. ATTEMPT TO DEPLOY THRUST REVERSERS AFTER INSTALLING GROUND LOCKS. REVERSERS SHOULD NOT DEPLOY.
D. Remove tailpipe fairings per 78-32-162 to gain access to forward side of thrust reverser shroud bulkhead.
E. Remove feedback control access panel located on left side of thrust reverser shroud assembly.
4. Remove Thrust Reverser
A. Disconnect feedback control cable at lower end of thrust reverser feedback control lever (Fig. 401).
506
May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 78-32-101 Page 401
H30659 H29360
Thrust Reverser Assembly Installation 500
78-32-101 Figure 401 (Sheet 1) May 15/69
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Thrust Reverser Assembly Installation
Feb 15/69 Figure 401 (Sheet 2) 78-32-101
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
B. Disconnect push-pull cable from shroud bulkhead by removing bolts.
NOTE: Check that feedback mechanism can pass through the shroud bulkhead when the thrust reverser is separated from the tailpipe extension.
C. Disconnect push-pull cable from brackets on tailpipe extension.
D. Disconnect proximity sensor electrical line from connector and clamps on shroud bulkhead and cap line.
E. Disconnect hydraulic stow and deploy lines from fittings on shroud bulkhead and cap hydraulic lines.
F. Provide support for thrust reverser to assume weight of unit when removing installation bolts. Reverser weighs approximately 392 pounds.
G. Remove 42 bolts attaching thrust reverser to tailpipe extension aft mounting flange.
H. Remove thrust reverser assembly.
CAUTION: MOVE THRUST REVERSER IN A HORIZONTAL DIRECTION UNTIL ALIGNMENT PIN AND FEEDBACK CONTROL CABLE ARE DISENGAGED.
5. Install Thrust Reverser
NOTE: If engine No. 1 reverser is being installed on engine No. 2, or engine No. 2 reverser is being installed on engine No. 1, deflector doors must be interchanged. Engine No. 1 lower door is interchangeable with engine No. 2 upper door, and engine No. 2 lower door is interchangeable with engine No. 1 upper door.
NOTE: When installing the thrust reverser, make sure that the reverser exhaust nozzle is the appropriate configuration for the engine model; a JT8D-17/-17A engine requires a nozzle with an average inside diameter of between 29.760 and 29.810 inches measured at a minimum of 4 places. Diameter may be determined by circumferential measurement using periphery tape (Norman Collins Co., Escondido, California). All measurements should be made at 60°F.
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