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against the cam [6].
NOTE: There will be continuity between pins 1 and 3 on the limit switch [5].
(c) Carefully loosen the inside nut [10], and then tighten the outside nut [10] to move the limit
switch [5] away from the cam [6] until there is not continuity through the pins.
(d) Make sure the limit switch [5] is in the correct position:
1) Pull the cable WFFB [11] to the side to turn the cam [6] slightly in the extend direction.
NOTE: Pull on the cable to deflect it approximately 1.2 inch (30.5 millimeters). Cable
WFFB [11] is the upper cable between the flap power drive unit and the flap
control unit [1].
2) Make sure there is continuity between the pins.
3) Pull the cable WFFA [12] to the side to turn the cam [6] slightly in the retract direction.
NOTE: Pull on the cable to deflect it approximately 1.2 inch (30.5 millimeters). Cable
WFFA [12] is the lower cable between the flap power drive unit and the flap
control unit [1].
4) Make sure there is no continuity between the pins.
5) Make fine adjustments of the nuts [10] until the limit switch [4] is in the correct position.
(e) Tighten the nuts [10] on the limit switch [5] to a minimum of 15 inch-pounds (1.695 Nm).
(f) Install lockwire on the nuts [10].
(g) Fillet seal with sealant, A02315
SUBTASK 27-51-63-730-003
(3) Do the test of the Flaps DOWN limit switch [5], S246, do this task: Flaps DOWN Limit Switch,
S246 Functional Test, TASK 27-51-63-720-802.
I. Put the Airplane Back to Its Usual Condition
SUBTASK 27-51-63-410-002
(1) Install the switch cover [3] on the flap control unit [1]:
(a) Put the switch cover [3] in its location on the flap control unit [1].
(b) Apply compound, C00913 to the shank and threads of the screws [2].
(c) Install the washers [11] and screws [2] that attach the switch cover [3].
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SUBTASK 27-51-63-440-002
(2) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
------------------------- END OF TASK ---------------------------
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Flap Limit Switches Adjustment
Figure 501 (Sheet 1 of 4)/27-51-63-990-802
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Flap Limit Switches Adjustment
Figure 501 (Sheet 2 of 4)/27-51-63-990-802
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Flap Limit Switches Adjustment
Figure 501 (Sheet 3 of 4)/27-51-63-990-802
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Flap Limit Switches Adjustment
Figure 501 (Sheet 4 of 4)/27-51-63-990-802
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TASK 27-51-63-720-801
3. Flaps UP Limit Switch, S245 Functional Test
(Figure 502)
A. General
(1) This task is applicable to the Flaps UP Limit Switch, S245.
B. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
27-41-71-700-801 Stabilizer Trim Motor Test (P/B 501)
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
34-21-00-820-801 Air Data Inertial Reference System - Alignment from the FMC CDU
(P/B 201)
34-21-00-820-802 Air Data Inertial Reference System - Alignment from the ISDU
(P/B 201)
C. Location Zones
Zone Area
117 Electrical and Electronics Compartment - Left
118 Electrical and Electronics Compartment - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Access Panels
Number Name/Location
117A Electronic Equipment Access Door
E. Flaps UP Limit Switch, S245 Test
SUBTASK 27-51-63-860-012
(1) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
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737-600-700-800-900 飞机维护手册5 AIRCRAFT MAINTENANCE MANUA(109)
