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78-32-142Page 402 Thrust Reverser Lock Installation Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 500 Feb 15/69
4. Install Thrust Reverser Lock
A. Apply Antiseize Compound - MIL-L-25681 to all threaded surfaces.
B. Position lock assembly inside thrust reverser shroud. (See figure 401.)
C. Attach forward end of lock assembly to shroud with screws, washers and nuts. Torque to 20-25 pound-inches.
D. Attach aft end of lock assembly to shroud bulkhead with screws, nuts and washers. Torque to 20-25 pound-inches.
E. Install proximity switch per 78-36-12.
F. Install union fittings and O-rings to actuator ports and torque to 130-150 pound-inches.
G. Remove caps from hydraulic lines and connect lines to actuator. Torque to 130-150 pound-inches.
H. Reactivate the thrust reverser hydraulic system by removing ground locks from both thrust reverser isolation valves.
I. Cycle thrust reverser through five cycles per 78-32-01 and check for leaks.
WARNING: PERSONNEL MUST STAY CLEAR OF THRUST REVERSER WHEN IT IS ACTUATED TO PREVENT BEING CAUGHT BY ROTATING DEFLECTOR DOORS.
J. Install access panel.
500
Aug 15/69 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 78-32-142 Page 403
THRUST REVERSER LOCK - ADJUSTMENT/TEST
1. Thrust Reverser Lock Adjustment
A. Check that deflector doors are correctly adjusted and that they fair with shroud as specified in 78-32-112, Deflector Door - A/T. For subsequent reference, note the gap between deflector door exterior surface and shroud exterior at latch bar.
B. Initiate reverse thrust to open deflector doors.
C. Remove hydraulic pressure by inserting ground locks on thrust reverser isolation valves.
D. To eliminate possible hydraulic interference in lock, manually extend upper and lower lock actuators.
E. Manually close both deflector doors until latch and latch bar engage. Then pull deflector doors toward open position until latch and latch bar make contact.
F. Measure the gap between shroud exterior and the exterior surface of deflector doors (Fig. 501).
G. The difference between the measurements obtained in steps A and F should be no greater than 0.120 inch for each door.
H. No minimum clearance between latch and latch bar is required, provided the latch fitting travels freely.
I. If the difference between the measurements obtained in steps A and F are greater than 0.120 inch for each door, adjust the latch fitting vertically. Do not exceed a maximum gap dimension between latch and latch bar of 0.120 inch (Fig. 501). Latch fitting adjustment is accomplished by loosening four bolts attaching fitting to forward flange of deflector door. Serrations on the back of fitting engage the serrations on retaining plate to hold the fitting in the position selected (Fig. 502).
NOTE: Before loosening attaching bolts, index the position of latch fitting on serrated retaining plate. Adjust one serration at a time. If the slotted holes in the latch fitting are not long enough to comply with the requirement in step I., the slot length may be increased one serration.
2. Restore Airplane to Normal
A. Reactivate thrust reverser hydraulic system by removing ground locks from both thrust reverser isolation valves.
506
Oct 20/87 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 78-32-142 Page 501
H27594 H30137
Thrust Reverser Lock Adjustment 500
78-32-142 Figure 501 Oct 20/87
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Examples of Difference Calculations
Dimension obtained from step F +0.13
Dimension obtained from step A - (+0.03)
0.10 Gap between latch and latch
bar. (No lock adjustment
required.)
Dimension obtained from step F +0.06
Dimension obtained from step A - (-0.04)
0.10 Gap between latch and latch
bar. (No lock adjustment
required.)
Dimension obtained from step F +0.13
Dimension obtained from step A - (-0.03)
0.16 Gap between latch and latch
bar. (Adjustment is required
to bring this dimension to
0.12 or less.)
500 Thrust Reverser Lock Latch Fitting
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