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A 737-300/400/500MAINTENANCE MANUAL
Trailing Edge Flap Adjustment
Figure 502 (Sheet 1)
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A
737-300/400/500
MAINTENANCE MANUAL
SHIMS
FILLER
MIDFLAP
CLEARANCE TO BE SYMMETRICAL BETWEEN THE OPPOSITE MIDFLAPS
Trailing Edge Flap Adjustment Figure 502 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
20
CHANGE IN TRIMMED CONTROLWHEEL POSITION - DEGREESONE AILERON TRIM UNIT EQUALS6 DEGREES AT THE CONTROL WHEEL
15
10
5
0
Trailing Edge Flap Trim Chart
Figure 503 (Sheet 1)
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A 737-300/400/500MAINTENANCE MANUAL
TURNS OF OUTBOARD FLAP TORQUE TUBE
CHANGE IN SHIM THICKNESS - OUTBD FLAP CARRIAGES - INCHES
Trailing Edge Flap Trim Chart Figure 503 (Sheet 2)
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A 737-300/400/500MAINTENANCE MANUAL
(e) If the right wing is heavy and high left trim is necessary, do one of these steps to change the shim thickness:
NOTE:____ The thickness of the shims on the inboard and outboard carriages must be changed equally.
(f) 1) Add shims to the right supports of the carriage bearing. 2) Remove shims from the left supports. 3) Add shims to the right supports and remove shims from the left supports.If the left wing is heavy and high right trim is necessary, do one of these steps to change the shim thickness:
NOTE:____ The thickness of the shims on the inboard and outboard carriages must be equal.
1) 2) 3) Add shims to the left supports of the carriage bearing.Remove shims from the right supports.Add shims to the left supports and remove shims from the right supports.
(2) S 435-026Install the bolt with the washer and the nut (Fig. 502).
NOTE:____ A lateral trim correction for the flap up position will have an effect on the flaps at the 15-unit position.
(3) S 435-027Tighten the 1/4 inch nut to 50-70 pound-inches.
(4) S 435-028Tighten the 5/16 inch nut to 100-140 pound-inches.
(5) S 435-029Install the cotter pins.
(6) S 225-030Do a check of the clearance between the spoiler and the flap (AMM 27-61-00/501 and AMM 27-62-00/501).
(7) S 865-031Do a check of the position of the leaf springs on the outboard flap: (a) Move the flap control lever to the 40-unit detent to extend the flaps. (b) Measure the dimension A (Fig. 502). (c) Move the flap control lever to the FLAP UP detent to retract the flaps. (d) Measure the dimension A again.
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