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32-61-21
ALL ú ú 01 Page 205 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-012
(7)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the overhead circuit breaker panel, P7:
(a)
7F23, LANDING GEAR DSP & CONT ALTN (alternate sensor)
(b)
7F22, LANDING GEAR DSP & CONT PRI (primary sensor)
S 862-014
(8) Put the airplane back to the ground mode (Ref 32-09-02/201).
TASK 32-61-21-822-038
4. Adjust the Uplock Sensor for the Wing Gear (Airplane Not On Jacks)__________________________________________
A. Standard Tools and Equipment
(1)
Actuating Tool - (0.5 inch diameter 24 inches long) with rubber sleeve (Recommended)
(2)
A wood bar with a sufficient length to move the uplock mechanism (Alternative)
B.
References
(1)
09-11-00/201, Towing
(2)
24-22-00/201, Manual Control
(3)
29-11-00/201, Main Hydraulic Supply System
(4)
32-00-30/201, Landing Gear Door Locks
(5)
32-09-03/501, Proximity Switch Electronics Unit
C.
Access
(1)
Location Zone
135 Wing Landing Gear Wheel Well, LH
136 Wing Landing Gear Wheel Well, RH
D.
Prepare for the Adjustment
S 862-082
(1) Make sure there is no pressure to hydraulic system No. 4 (Ref 29-11-00/201).
S 492-046
WARNING: MAKE SURE THE GROUND LOCKS ARE INSTALLED ON THE NOSE AND MAIN
_______ LANDING GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Make sure that ground locks for the nose and main landing gear are installed (AMM 09-11-00/201).
S 492-047
WARNING:_______OBEY THE INSTALLATION PROCEDURE FOR THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Install the door locks on the main landing gear (AMM 32-00-30/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-61-21
ALL ú ú 01 Page 206 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
E. Adjust the Uplock Sensor (Fig. 202)
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