G13030F96161
Inboard Foreflap Installation 500
27-51-41 Figure 401 (Sheet 1) Aug 01/74
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
500 Inboard Foreflap Installation
Aug 01/96 Figure 401 (Sheet 2) 27-51-41
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
F. Check alignment of pivot rollers with access holes in sides of foreflap cams (Fig. 401). If rollers and access holes are not aligned, proceed as follows:
(1)
On circuit breaker panel P6, close FLAP VALVES and TE ALT FLAP DRIVE MOTOR circuit breakers.
(2)
Position ALTERNATE FLAPS arm switch at ARM.
(3)
Operate ALTERNATE FLAPS control switch to UP or DOWN as necessary to align pivot rollers with access holes.
G. Remove two track attach bolts at each foreflap track to disconnect track from foreflap. Note location of shims and retain shims for installation.
CAUTION: DO NOT ALLOW DISCONNECTED TRACKS TO FALL INTO MIDFLAP. LOWER TRACKS GENTLY TO AVOID DAMAGE IN MIDFLAP.
H. Remove four pivot rollers and lift foreflap away from toggle and flap.
4. Install Inboard Foreflap
A. If existing bushings or bearings are to be used, check allowable wear (Ref 27-51-41,
Inspection/Check).
B. Position foreflap on toggle so that pivot rollers may be installed through access holes in sides of foreflap cams (Fig. 401) and install pivot rollers as follows:
(1)
Position bushing in pivot roller.
(2)
Secure with washer and nut. Tighten nut to 50-100 pound-inches.
(3)
Install cotter pin.
C. Connect foreflap tracks to foreflap (3 places).
(1)
Trim shims to fit gaps between foreflap track and track attach fitting. Maximum allowable gap between track and fitting is 0.002 inch after shimming.
(2)
Install shims with wet primer.
(3)
Install two track attach bolts to secure track to fitting.
(a)
Coat bolt with grease.
(b)
Install forward bolt and secure with washer and nut. Tighten nut to 30-40 pound-inches.
(c)
Install aft bolt and secure with washer and nut. Tighten nut to 50-100 pound-inches.
500
27-51-41 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/01
D. Install the bolt that attaches the exhaust gate actuation mechanism to the foreflap.
(1) Tighten the nut.
E. Provide system A hydraulic power (Ref 27-51-0).
F. Position flap control lever to FLAP UP detent.
CAUTION: WITH ENGINE-TO-WING FAIRING TAIL CONE REMOVED, ENSURE THAT HINGED FLAP SEGMENT FENCE DOES NOT INTERFERE WITH STRUCTURE WHEN FLAPS RETRACT.
G. Extend ground spoilers (Ref 27-62-0), Speed Brake Control System).
H. Remove system A hydraulic power (Ref 27-51-0).
I. Check gap between trailing edge of foreflap and top of midflap as shown in Fig. 401. If gap is not within limits, add or delaminate shims between foreflap and track attach fitting (section A-A), as required to obtain correct gap. Apply primer to bare areas on shims.
J. With flaps in normal up position, check that bulb seal on lower forward edge of ground spoiler with respect to upper edge of foreflap is compressed 0.10 to 0.20 inch. If seal compression is not within limits adjust seal retainer to obtain compression.
K. Install inboard flap track fairing (Ref 27-51-141, Removal/Installation).
500
Aug 01/96 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-51-41 Page 405
INBOARD FOREFLAP - INSPECTION/CHECK
1. General
A. This data consists of illustrations and a wear limit chart. There will be no procedure given for gaining access to the component for removal or replacement after inspection for wear. Refer to Inboard Foreflap - Removal/Installation for this information.
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