(a)
Remove the plugs and caps from the hydraulic lines and tubes.
(b)
Connect the hydraulic lines to the flap control valves.
S 434-019
(10)
Connect the WFFA and WFFB cables to the follow-up drum.
(a)
Wind the WFFA cable approximately 1-1/2 turns and attach it to the follow-up drum.
NOTE: At the flap power unit, the WFFA cable will have
____
approximately 2-1/4 turns.
(b) Wind the WFFB cable approximately 2-1/2 turns and attach it to the follow-up drum.
NOTE: At the flap power unit, the WFFB cable will have
____
approximately 1/3 turn.
(c) Tighten the turnbuckles on the cables.
S 094-020
(11)
Remove the rig pin F-1.
S 014-021
(12)
Install the cable guard.
S 434-022
(13)
Install the flap limit switches:
NOTE: Make sure you install the limit switches in the correct
____
position on the flap control unit.
(a)
Remove the finish at the switch mounting areas on the flap control unit.
(b)
Put one retaining nut on the switch.
(c)
Install the switch in the flap control unit with the retaining nut and the roller guide.
(d)
Install the pin in the roller guide.
(e)
Use the wrench set to tighten the nuts.
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737-300/400/500MAINTENANCE MANUAL
(f) Do this task to measure the bonding resistance between each
limit switch and the flap control unit: "Electrical Bonding
Check" (SWPM 20-20-00).
NOTE:____ The resistance must be less than 0.0025 ohms.
(g) Apply a layer of the primer to the exposed areas.
(h) Install the lockwire on the retaining nuts.
S 724-023
(14)
Do this task: "Flap Control Unit Functional Test" (AMM 27-51-74/501).
S 414-024
(15)
Install the switch cover:
(a)
Apply a layer of the grease to the switch cover.
(b)
Install the switch cover on the flap control unit.
S 414-025
(16)
Install the lower pan:
(a)
Apply a layer of the grease to the lower pan.
(b)
Install the lower pan on the flap control unit.
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737-300/400/500MAINTENANCE MANUAL
FLAP CONTROL UNIT - ADJUSTMENT/TEST
___________________________________
1. General
_______
A. There are two tasks in this procedure. There is one task for the adjustment of the flap control unit. There is also a functional test of the flap control unit.
TASK 27-51-74-825-001
2. Flap Control Unit Adjustment
____________________________
A. Special Tools and Equipment
(1)
F70300-1 Flap Drive Adapter
(2)
F80197-5 Wrench Set
B.
Standard Tools and Equipment
(1)
Rig Pin (F-1) - 0.311 +0.000/-0.002 inch diameter, 3.40 |0.06 inches long (MS20392-4)
NOTE: The rig pin is a part of the kit F70207-69, -78, or -83.
____
(2)
Tensiometer - 0 to 100-pound capacity
C.
Consumable Materials
(1)
D00013 Grease - MIL-G-23727
D.
References
(1)
AMM 22-21-31/501, Mach Trim Flap Switch
(2)
AMM 27-51-00/201, Trailing Edge Flap Systems
