6 SLIDER *[2] X
*[1] 0.045 MIN THICKNESS, 0.015 MAX WEAR
*[2] OUTBOARD FLAP TRACK FAIRINGS - REMOVAL/INSTALLATION
SLIDER THICKNESS VARIATION ALLOWABLE WEAR DIMENSION
Max Min Fwd End Aft End
0.145 0.135 0.010 0.120 0.03
Outboard Foreflap Sequencing Carriage Wear Limits 500
27-51-111 Figure 601 (Sheet 2) Feb 01/76
Page 602
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
1. Remove Flap Track Fairing
A. Provide system A hydraulic power (Ref 27-51-0, Maintenance Practices).
B. Position flap control lever to FLAP DOWN (40-unit) detent, and remove system A hydraulic power (Ref 27-51-0).
C. Remove access panel from center fairing assembly (Fig. 401).
D. For outboard fairing:
(1)
Remove screws attaching aft fairing to center fairing assembly.
(2)
Remove landing light electrical connector at forward end of fairing.
(3)
Remove bolts from landing light cam track.
(4)
Remove bolt and cam follower from pushrod attached to cam arm.
E. Remove bolts and bushings attaching center fairing assembly hinge fitting to fairing support on flap track (Fig. 401).
NOTE: Bushings must be removed from side of clevis with larger hole.
F. Roll center fairing assembly aft to free fairing tracks from track rollers.
G. If fairing is being replaced, remove cam track from fairing. Identify shim as to location and retain for installation in new fairing.
2. Install Flap Track Fairing
A. If existing bushings, bearings and bolts are to be used, check allowable wear (Ref 27-51-121, Inspection/Check).
B. If removed, install cam track in fairing as follows:
(1)
Provide system A hydraulic power (Ref 27-51-0, Maintenance Practices).
(2)
Retract flaps to full up position.
543
Aug 01/75 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-51-121 Page 401
G21258F96420
Outboard Flap Track Fairing Installation 501
27-51-121 Figure 401 Nov 01/74
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
501 Landing Light Adjustment
Aug 01/96 Figure 402 27-51-121
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(3)
Measure and record distance between fairing pivot point and bellcrank pivot point and record as dimension Y (Fig. 401).
NOTE: Flap track fairing center section must be removed from airplane and flaps fully retracted before dimension Y can be measured.
(4)
Extend flaps and remove hydraulic power (Ref 27-51-0).
(5)
Position cam track in fairing as follows:
NOTE: For initial check, cam tracks should be positioned on serrated plates with bolts in center of slotted holes.
(a)
Use straight edge and square across fairing tracks to locate cam track parallel to
W.B.L.
(b)
Install tapered shims and bolts to hold cam track in position.
(c)
Check that fairing track is 5.92 to 5.94 inches from cam track on cam side and that parts are parallel. If not , add shims behind fairing track.
(d)
Check that dimension between fairing tracks is 11.14 to 11.16 inches and that tracks are parallel. If not, add shims behind fairing track opposite cam side of cam track.
(6)
Measure distance between forward end of cam track and fairing pivot point and record as dimension X (Fig. 401).
(7)
Check that difference between dimensions X and Y is 5.78 to 6.07 inches for inboard fairing and 5.34 to 5.74 inches for outboard fairing. If not, adjust cam track forward or aft to obtain these dimensions.
(8)
Tighten bolts.
C. Engage bellcrank roller with cam track and support arm rollers with fairing tracks.
D. Roll center fairing forward and align hinge fitting with suport fitting on flap track. Install bushings and bolts (Fig. 401).
543
27-51-121 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/78
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