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27-51-00-860-804 Retract the Trailing Edge Flaps (P/B 201)
32-00-01-480-801 Landing Gear Downlock Pins Installation (P/B 201)
C. Location Zones
Zone Area
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
D. Prepare for the Removal
SUBTASK 27-51-63-860-001
(1) If the trailing edge flaps are not in the retracted position, do this task: Retract the Trailing Edge
Flaps, TASK 27-51-00-860-804.
SUBTASK 27-51-63-480-001
WARNING: MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING GEAR.
WITHOUT THE DOWNLOCK PINS, THE LANDING GEAR CAN RETRACT AND CAUSE
INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) If the downlock pins are not installed in the nose and main landing gear, do this task: Landing
Gear Downlock Pins Installation, TASK 32-00-01-480-801.
SUBTASK 27-51-63-040-001
(3) Do this task: Trailing Edge Flap System Deactivation, TASK 27-51-00-040-801.
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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
E. Flap Limit Switch Removal
GUN ALL; AIRPLANES WITH TRAILING EDGE FLAPS UP SWITCH S00245
SUBTASK 27-51-63-860-002
(1) Open these circuit breakers and install safety tags:
CAPT Electrical System Panel, P18-1
Row Col Number Name
C 7 C00285 YAW DAMPER AC
CAPT Electrical System Panel, P18-3
Row Col Number Name
D 11 C00442 PASSENGER CABIN SIGNS PASS SIGN CONT
F/O Electrical System Panel, P6-2
Row Col Number Name
A 7 C00210 FLIGHT CONTROL FLAP SHUTOFF VALVES
B 10 C00207 FLIGHT CONTROL STAB TRIM CONT
GUN ALL; AIRPLANES WITH TRAILING EDGE FLAPS UP SWITCH S00246
SUBTASK 27-51-63-860-003
(2) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 7 C00210 FLIGHT CONTROL FLAP SHUTOFF VALVES
GUN ALL
SUBTASK 27-51-63-860-004
(3) Open these circuit breakers and install safety tags:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 15 C01081 HYDRAULIC SYSTEM PTU VALVE CONT 1
A 16 C01085 HYDRAULIC SYSTEM PTU VALVE CONT 2
B 8 C01464 FLIGHT CONTROL ELEV TAB VLV RIGHT
B 13 C00363 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
C 13 C01074 FLIGHT CONTROL SHUTOFF VALVES FLT CONT
F/O Electrical System Panel, P6-3
Row Col Number Name
E 14 C00316 INDICATOR MASTER DIM SECT 4
F/O Electrical System Panel, P6-4
Row Col Number Name
GUN 101-122
A 8 C00265 AIR CONDITIONING RAM AIR MOD CONT LEFT
GUN ALL
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SUBTASK 27-51-63-010-001
(4) Remove the switch cover [8] from the flap control unit [1]:
(a) Remove the screws [7] and washers [21] that attach the switch cover [8].
(b) Remove the switch cover [8] from the flap control unit [1].
SUBTASK 27-51-63-020-001
(5) Disconnect the electrical wires from the applicable limit switch:
(a) Disconnect the connectors [6] for the wire bundle [5].
(b) Remove the screws [4] and the six clamps [3] for the wire bundle [2].
(c) Cut the wire bundle ties and isolate the switch wires from the remaining wires in the wire
bundle [2].
(d) Remove the switch leads from the connector [6].
SUBTASK 27-51-63-020-002
(6) Remove the limit switch [9]:
(a) Remove the roller guide lock ring [12] from the roller guide [11].
(b) Remove the roller guide [11] from the limit switch [9].
(c) Remove the nut [13] and washer [14] from the limit switch [9].
(d) Remove the limit switch [9] with the nut [13] and washer [15] from the flap control unit [1].
(e) Put the nut [13], washer [14], roller guide [11] and the roller guide lock ring [12] on the limit
switch [9] to keep the parts together.
SUBTASK 27-51-63-020-003
(7) Remove the limit switch [10]:
(a) Remove the roller guide lock ring [17] from the roller guide [16].
(b) Remove the roller guide [16] from the limit switch [10].
(c) Remove the nut [18] and washer [19] from the limit switch [10].
(d) Remove the limit switch [10] with the nut [18] and washer [20] from the flap control unit [1].
(e) Put the nut [18], washer [19], roller guide [16] and the roller guide lock ring [17] on the limit
switch [10] to keep the parts together.
------------------------- END OF TASK ---------------------------
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