G29567
506 Inboard Midflap Seal Plate Installation
Aug 15/76 Figure 401 27-51-341
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
AFT FLAP ACTUATING MECHANISM BOOM CABLES - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Rigging Pins - F-5 and F-6, 0.248 +0.000/-0.002 inch diameter, 3.7 +0.25 inches long (MS20392-3)
NOTE: Rigging pins are a part of kit F70207-61, or -84.
B. Deleted
2. Remove Aft Flap Actuating Mechanism Boom Cables (Fig. 401)
A. Remove inboard flap track fairing (Ref 27-51-141 R/I).
B. Remove access panels L8476-8477/8576-8577R on underside of inboard midflap.
C. Provide system A hydraulic power (Ref 27-51-0 MP).
D. Position flap control lever to fully extend flaps.
E. Remove system A hydraulic power (Ref 27-51-0 MP).
F. Loosen cable adjusting nuts (7) and (10) (Detail A, Fig. 401) and disconnect cable ends from socket of end fittings.
G. Remove cable guard (4).
H. Remove screw holding cables BC-3 and BC-4 to cable drum (1).
I. Remove cables BC-3 and BC-4.
3. Install Aft Flap Actuating Mechanism Boom Cables (Fig. 401)
A. Feed cables from boom area into aft flap drive mechanism. With aft flap fully extended, attach cable BC-3 to mechanism with approximately l/3 turn on drum. Cable must be in middle cable groove.
B. Maintaining tension on cable BC-3, feed cable onto drum while slowly turning cable drum until aft flap is fully retracted. Install a cable clamp on cable BC-3 to block cable and prevent movement when aft flap is released.
May 01/99 27-51-351 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
G27707G28241
Aft Flap Actuating Mechanism Boom Cables Installation 500
27-51-351 Figure 401 (Sheet 1) Feb 15/77
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
589 Aft Flap Actuating Mechanism Boom Cable Installation
Aug 15/80 Figure 401 (Sheet 2) 27-51-351
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
C. Check that cable BC-3 is wrapped approximately 1-1/3 turns on drum and is in middle and lower cable grooves.
NOTE: The lower groove is closest to bottom of flap.
D. Position and attach cable BC-4 to the drum.
(1) Cable should have approximately 1/2 turn on cable drum and should be in middle groove.
E. Install screw, washer and nut to lock ends of cables BC-3 and BC-4 in place on cable drum (1).
F. Place cable BC-4 in groove of pulley (2) and pull cable end through cutout in flap rib.
G. Thread cable BC-4 over pulley (5) under pulley (3) and around pulley (9) and hang a one or two pound weight on end of cable.
H. Pull end of cable BC-3 through cutout in flap rib.
I. Thread cable BC-3 over pulley (6) and under pulley (9) to forward end of boom (8).
J. Place end fitting of cable BC-3 in socket of boom end fitting.
K. Remove cable clamp from BC-3 while manually holding tension on BC-3 and BC-4.
L. Manually operate aft flap from retract to full extend by pulling on BC-3 and holding tension on BC-4 while watching cables in drum grooves to see that they do not bind due to being crossed.
M. With aft flap full down BC-3 should be in center groove at point A and BC-4 should be in upper groove at point B (View 1 and 2).
N. Manually operate aft flap to full up while watching cables in drum grooves. With aft flap full up
BC-3 should be in lower groove at point A and BC-4 should be in the center groove at point B. N1. Manually extend aft flap.
O. Place end fitting of cable BC-4 in socket of boom at end fitting at aft end of boom (8).
P. Tighten cable adjusting nut (7) to take up slack in cable BC-4.
Q. Tighten cable adjusting nut (10) to take up slack in cable.
Q-1. Provide system A hydraulic power (Ref 27-51-0).
Q-2. Retract trailing edge flaps.
Q-3. Remove system A hydraulic power (Ref 27-51-0).
R. Install rigging pins F-5 and F6 through inboard side of boom so that boom roller is trapped between pins (View 3, Fig. 401).
S. Tighten cable adjusting nuts (7) and (10) to position cam roller 0.42 +0.03 inch from forward of cam slot in cable drum (1) (View 2, Fig. 401).
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