27-51-00
ALL ú ú 01 Page 507 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-008
(16) Do this task to pressurize hydraulic systems No. 1 and 4:
"Hydraulic System Pressurization" (Ref 29-11-00/201).
S 725-010
WARNING: MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE LE
_______ AND TE FLAPS. THE LEADING EDGE FLAPS WILL MOVE WHEN THE TRAILING EDGE FLAPS MOVE.
(17)
Do a test of the inboard trailing edge flap no-coast drag brake:
(a)
Push the ALTN FLAPS ARM switch to the ALTN position.
(b)
Turn the ALTN FLAPS EXT/RET switch to the EXT position.
(c)
When the inboard TE flaps are at the 20-unit position, turn the ALTN FLAPS EXT/RET switch to the OFF position.
(d)
Make sure that the TE flaps stop in 1 inch (2.5 cm) or less of ball screw travel.
(e)
Retract the flaps: 1) Move the control lever to the 20-unit position.
WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE
_______ LE AND TE FLAPS AND FLAP DRIVE MECHANISMS. THE TE AND LE FLAPS WILL MOVE TO AGREE WITH THE CONTROL LEVER POSITION WHEN YOU DISARM ALTERNATE CONTROL. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
2) Push the ALTN FLAPS ARM switch to the off position. 3) Move the control lever to the UP detent to retract the flaps.
E. Put the Airplane Back to Its Usual Condition
S 865-011
(1)
Do this task to depressurize hydraulic systems No. 1 and 4:
"Hydraulic System Depressurization" (Ref 29-11-00/201).
(2)
Do this task: "Remove Electrical Power" (Ref 29-11-00/201).
S 865-012
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27-51-00
ALL ú ú 01 Page 508 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 095-027
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW 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 OR DAMAGE TO EQUIPMENT.
(3) Do this task: "Removal of the Door Locks from the Body Landing Gear" (Ref 32-00-30/201).
TASK 27-51-00-735-015
3. System Test - Trailing Edge Flap Load Relief System___________________________________________________
A. References
(1)
24-22-00/201, Manual Control
(2)
29-11-00/201, Main Hydraulic Supply System
(3)
34-11-00/201, Pitot-Static System
B.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C.
Procedure
S 865-016
(1) Do this task: "Supply Electrical Power" (Ref 24-22-00/201).
S 865-017
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Do this task to pressurize hydraulic systems No. 1 and 4: "Hydraulic System Pressurization" (Ref 29-11-00/201).
S 865-018
(3)
Do this task to connect a pitot presssure source to the Pilots and the F/O pitot-static system: "Pressurization" (Ref 34-11-00/201).
(a)
Set the airspeed to 0 knots.
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