(d)  
Return reverse thrust lever to idle. Advance lever beyond No. 1 detent to approximately No. 2 detent (do not exceed takeoff thrust), and retard lever until No. 1 detent is contacted. The EPR shall comply with applicable engine model.

(e)  
Stow levers and shut down engines.

(6)  
Restore reverse thrust follow-up mechanism.

(a)  
Remove isolation valve locking pins.

(b)  
Connect reverse thrust follow-up push-pull cable.

(c)  
Close isolation valve circuit breakers.

577 
Feb 15/81  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  78-32-01 Page 511 

570 
78-32-01 Page 512  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Feb 15/81 

F42600 L13127
570  Reverse Thrust Detent Adjustment 
May 15/78  Figure 503 (Sheet 1)  78-32-01 
Page 513 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Minimum Power (No. 1) Detent Operation  567 
78-32-01  Figure 503 (Sheet 2)  May 20/82 
Page 514 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

THRUST REVERSER ASSEMBLY - DESCRIPTION AND OPERATION
1. General
A.  The thrust reverser assembly is located on the aft end of each engine, and is attached to a tailpipe extension which in turn is attached to the engine. The thrust reversers, when actuated, provide reverse thrust as a means of decelerating the aircraft during landing roll or after a rejected takeoff. The thrust reversers are intended for ground use only. Reverse thrust is provided by two deflector doors which open aft, blocking the engine exhaust gas flow and deflecting the exhaust gas forward. Each thrust reverser operates independently of the other reverser.
B.  The components of the thrust reverser assembly consist of an integral tailpipe and shroud assembly, two deflector doors, two deflector door actuators, two deflector door locks, deflector door actuating linkage, and thrust reverser fairings. (See figure 1.) With the reverser in the forward thrust position, exhaust gases flow unrestricted through the reverser unit. A double flanged tailpipe extension is installed between the aft end of the engine and the forward end of the thrust reverser to direct the exhaust gases for the proper thrust angle during forward thrust operation.
C.  The thrust reverser is hydraulically actuated by system A hydraulic pressure and is controlled by a thrust reverser control system which pressurizes the stow or deploy ports on the thrust reverser actuators. The control for each thrust reverser is separate, operating through the engine control system for the applicable engine. Refer to 78-34-01 for a description of the thrust reverser control system.
506 
May 15/69  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  78-32-101 Page 1 

H29362 H29357
Thrust Reverser Assembly  500 
78-32-101  Figure 1 (Sheet 1)  Nov 15/70 
Page 2 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

500  Thrust Reverser Assembly 
Feb 15/69  Figure 1 (Sheet 2)  78-32-101 
Page 3 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

2.  Thrust Reverser Assembly
A.  Deflector Doors
(1)  The deflector doors form the external cowling around the engine exhaust nozzle when the reverser is in the forward thrust position. When in the reverse thrust position, the deflector doors block the engine exhaust gas flow and deflect the exhaust gas forward, over and under the wing. (See figure 1.) The doors are oriented 30 degrees from the vertical. There are two deflector doors on each reverser, a lower and an upper door. Attached to the upper deflector door is a deflector door fairing which is not part of the door assembly. The deflector door is retained by linkage connecting it to the thrust reverser. During reverse thrust actuation, the thrust reverser actuators, through linkages, cause the doors to move aft and rotate outward simultaneously.
B.  Thrust Reverser Actuators
(1)  The thrust reverser actuators are hydraulically operated, and provide the mechanical driving force to operate the deflector doors when reverse or forward thrust has been selected at the control stand. (See figure 1.) There are two actuators on each reverser. The actuators are located on opposite sides of the thrust reverser, and are oriented 30 degrees from the horizontal. Each actuator is mounted in an actuator housing. When system A hydraulic pressure is applied to the deploy port of the actuator, the actuator piston rod retracts deploying the deflector doors. An internal snubbing provision is employed to cushion the piston at the end of the retracting stroke. Pressure is applied to the stow port of the actuator to return the reverser to the forward thrust position. This extends the actuator piston rod driving the guide carriage aft and closing the deflector doors.
　
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