position.
(b)
Move the flap control lever from the UP detent to the 30-unit detent. 1) Make sure that the flaps do not move.
(c)
Move the flap control lever from the 30-unit detent to the UP detent. 1) Make sure that the flaps do not move.
(d)
Make sure that the lever on the flap bypass valve moves from position 2 to position 1 (Fig. 501).
S 715-045
(3)
Do a test of the operation time of the alternate trailing edge flaps.
(a)
Put the ALTN FLAPS EXT/RET switch in the EXT position to extend the TE flaps.
(b)
Make sure that the inboard flaps extend to the 25-unit position and then stop.
(c)
Make sure that the outboard flaps extend to between 18 and 26 units and stop.
(d)
Make sure that the time for the flaps to extend is a maximum of 360 seconds.
(e)
Stop for 5 minutes to let the electric drive motors become cool.
(f)
Put the ALTN FLAPS EXT/RET switch in the RET position to retract the flaps.
(g)
Make sure that the time for the flaps to retract is a maximum of 360 seconds.
(h)
Put the ALTN FLAPS EXT/RET switch in the OFF position.
WARNING: THE TRAILING EDGE FLAPS WILL MOVE TO AGREE WITH THE
_______ CONTROL LEVER POSITION WHEN ALTERNATE CONTROL IS DISARMED. MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE TE AND LE FLAPS.
(i)
Push the ALTN FLAPS ARM switch to disarm the flaps alternate control.
F.
Put the Airplane Back to Its Usual Condition
(1)
Put the flap control lever in the UP position to retract the flaps.
S 865-036
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A
747-400 MAINTENANCE MANUAL
S 095-037
WARNING:_______ CAREFULLY DO THE SPECIFIED TASK TO REMOVE THE DOOR LOCKS FROM
THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO
NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Remove the door locks from the doors for the body landing gear (Ref 32-00-30/201).
S 865-038
(3)
Release the pressure in hydraulic systems No. 1 and 4 (Ref 29-11-00/201).
S 865-039
(4)
Remove electrical power (Ref 24-22-00/201).
S 415-040
(5)
Install the access panels on the flap track fairings.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FLAP POWER PACKAGE - REPAIRS
____________________________
1. General_______
A. There is one task in this procedure: the replacement of the flap power package quill shaft.
B. The flap power package quill shaft connects the torque tube follow-up gear to the power control package control valve and flap position RVDT. There is a shear out point in the quill shaft.
TASK 27-51-09-968-001
2. Flap Power Package Quill Shaft Replacement__________________________________________
A. Consumable Materials
(1)
D00633 Grease - BMS 3-33 (recommended)
(2)
D00013 Grease - MIL-G-23827 (alternative)
B.
References
(1)
27-51-09/501, Flap Power Package
(2)
32-00-30/201, Landing Gear Door Locks
(3)
IPC 27-51-09, Fig. 1 and 3
C.
Access
(1)
Location Zone
137 Body Landing Gear Well, LH
138 Body Landing Gear Well, RH
D.
Prepare for the Replacement
S 498-002
(1) Make sure that the landing gear ground locks are installed.
S 498-003
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