(2)
Partially extract eccentric bushing to disengage lock.
(3)
Rotate eccentric bushing to obtain adjustment and engage lock.
NOTE: Eccentrics must be adjusted equally on both sides of track.
(4)
Secure deadweight roller bolt with washer and nut. Tighten nut 12 to 15 pound-inches.
D2. If gap between aft flap track and forward flight rollers is incorrect, adjust forward deadweight roller as follows (Detail A and B, Fig. 401):
(1)
Remove cotter pin, nut, and washer from forward deadweight roller bolt.
(2)
Partially extract eccentric bushing to disengage lock.
(3)
Rotate eccentric bushing to obtain adjustment and engage lock.
NOTE: Eccentrics must be adjusted equally on both sides of track.
(4)
Secure deadweight roller bolt with washer and nut. Tighten nut 12 to 15 pound-inches.
May 01/03 27-51-91 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
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543 Outboard Flap Aft Flap Installation
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D3. Apply 15 to 30 pounds downward force against a minimum 4.0 by 5.0 inches aluminum plate on aft edge of upper surface of aftflap at each track and check that forward and aft deadweight rollers are contacting aftflap track flanges and that forward and aft flight rollers clear track flanges.
D4. Apply 15 to 30 pounds upward force against a minimum 4.0 by 5.0 inches aluminum plate on aft edge of lower surface of aftflap at each track and check that forward and aft flight rollers are contacting aftflap track flanges and that forward and aft deadweight rollers clear track flanges.
D5. Check that 0.000 to 0.025 inch gap exists between aftflap track and forward and aft flight rollers.
D6. If incorrect gap exists between aftflap track and forward and aft flight rollers, readjust forward and aft deadweight rollers per steps D. thru D6.
D7. Move aftflap forward and aft for full length of travel and check for binding of rollers.
E. If rollers bind, readjust deadweight rollers while maintaining 0.000 to 0.025 inch gap between aftflap track and forward and aft flight rollers.
NOTE: Eccentrics must be adjusted equally on both sides of track.
F. Connect pushrods to aftflap with boltheads up. Coat bolts with corrosion preventive compound before installing. Tighten nuts and install cotter pins.
CAUTION: BOLTS MUST BE INSTALLED WITH HEADS UP TO PREVENT BOLTS FROM DAMAGING MIDFLAP AND/OR AFTFLAP PUSHRODS AND AFTFLAP.
DO NOT INSTALL WASHERS ON BOLT HEAD. THE WASHER INSTALLATION CAN CAUSE DAMAGE TO THE MIDFLAP AND AFTFLAP.
G. Pressurize hydraulic system A (Ref 27-51-0).
H. Adjust aftflap as follows (Section A-A, Fig. 401).
(1)
Retract flaps.
(2)
Check that aftflap leading edge-to-midflap trailing edge gap is as shown.
(3)
Check that mismatch between lower surface of midflap and aftflap is as shown.
(4)
Check that gap between midflap trailing edge and aftflap upper surface is as shown.
(5)
Check that lower surface of midflap and aftflap are parallel.
(6)
Shim aft track and or support and adjust aftflap pushrods to obtain specified dimensions.
I. Position flap control lever to FLAPS DOWN (40-unit) position.
J. Remove system A hydraulic power and depressurize hydraulic system A (Ref\27-51-0).
K. Check that mid-to-aftflap gaps are per section A-A. Adjust gaps, if required, as follows:
(1)
Adjust aftflap bellcrank clevis arm at both flap track fairings on one or both wings as necessary to obtain correct initial gap. Ensure that dimension B remains within limits (section A-A).
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