NOTE: If required dimension is not obtained, disassemble and adjust positioning hinge bushing to obtain desired gap.
(5)
Lubricate bushing (16) inside and outside prior to installation.
D. Insert positioning hinge bushing (10). Lubricate bushing on inside and outside prior to installation. Bushings with locking feature must engage lock feature of bearing. See section A-A.
E. Use horizontal stabilizer thread protector to install hinge pin (2). Lubricate hinge pin and thread protector prior to installation (Fig. 402).
F. Install bushing spacer (6) and nut (7). Finger-tighten nut.
G. Install locking plate (11).
H. Install bushing retainer (17) over adjustable positioning hinge bushing in a position to allow locating bosses to engage over webs of body hinge structure. Rotate adjustable positioning bushing from original setting the minimum amount to provide for mating of bushing head with retainer notches. The bushing retainer is not used with installations using bearings with lock engage features. See section A-A.
I. Temporarily remove bushing retainer (17), if used, and tighten nut (7) 300 to 600 pound-inches. If cotter pin holes do not align, tighten nut further to a maximum of 30 degrees rotation to first cotter pin hole.
CAUTION: DO NOT APPLY TORQUE TO BOLTHEAD.
J. Use dial indication depth gage to check dimension previously recorded in step B. between center section assembly (5) and outboard hinge fitting (12). Dimension must be within +0.005 inch. If so, install outboard hinge fitting forward bolt under center section hinge.
K. Remove locking plate (11) and check gap between body structure and positioning hinge bushing (10). This gap must be 0.12 +0.07/-0.08 inch. If so, reinstall locking plate. If the 0.12 +0.07/-0.08 gap is not met, perform the following:
(1)
Remove existing bushing spacer (3).
(2)
Fabricate new bushing spacer from 2024-T4 with thickness sized to gap. New bushing spacer thickness is 0.12 +0.06/-0.06 inches.
(3)
Install new bushing spacer (3) per above instructions.
L. Reinstall bushing retainer (17) if used, with hinge insert pin (1). Rotate hinge insert pin until cotter pin hole is aligned with cotter pin hole defined in step M.
May 01/98 27-41-31 Page 403 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
F94324 C16578 F94386
Horizontal Stabilizer Center Section Hinge Fitting Installation 500
27-41-31 Figure 402 (Sheet 1) Aug 01/96
Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
502 Horizontal Stabilizer Center Section Hinge Fitting Installation
Aug 01/96 Figure 402 (Sheet 2) 27-41-31
Page 405
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Horizontal Stabilizer Center S3ection Hinge Fitting Installation 501
27-41-31 Figure 402 (Sheet 3) Aug 01/96
Page 406
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
M. Install washer (9) and nut (8) and tighten a maximum of 50 pound- inches. If cotter pin hole does not align, back off a maximum of 30 degrees to first cotter pin hole.
CAUTION: DO NOT TURN BOLTHEAD.
N. Install cotter pins in nuts (7) and (8).
O. Remove all support equipment in vicinity of hinge.
P. Remove stabilizer trim lock assembly.
Q. Using stabilizer trim control wheel check that stabilizer will smoothly operate through full travel between jackscrew stops.
R. Check that gap between jackscrew support fitting and fuselage structure just aft of jackscrew is
0.01 to 0.05 inch on both sides of stabilizer.
6. Restore Airplane to Normal
A. Replace end side door and stabilizer access panel. Close stabilizer trim access door.
B. Replace lower rear spar and trailing edge gap covers.
C. Reconnect electric plugs of electric actuator and autopilot actuator.
D. Position horizontal stabilizer trim cutout switches to NORMAL.
E. Close all circuit breakers opened on panel P6.
501
Jun 20/93 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-41-31 Page 407
HORIZONTAL STABILIZER CENTER SECTION HINGE FITTING . INSPECTION/CHECK
1. General
A. This procedure is a method of determining the amount of horizontal stabilizer free play. Total free play of the stabilizer is the accumulation of free play of the jackscrew and hinge mechanisms.
2. Equipment and Materials
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