32-41-09
ALL ú ú 01 Page 409 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
HYDRAULIC BRAKE ACCUMULATOR - INSPECTION/CHECK
______________________________________________
1. General_______
A. This procedure does a check of the pressure indication devices at the hydraulic brake accumulator.
TASK 32-41-09-706-014
2. Hydraulic Brake Accumulator Inspection/Check (Fig. 601)____________________________________________
A. References
(1)
AMM 09-11-00/201, Towing
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydrualic Supply System
(4)
AMM 31-61-00/001, Integrated Display System
(5)
AMM 32-00-30/201, Landing Gear Door Locks
(6)
AIPC 32-41-09 Fig. 1
B.
Access
(1)
Location Zone
138 Body Landing Gear Well - Right
221 Control Cabin, LH
C.
Prepare for the Inspection/Check
S 866-023
(1)
Make sure the landing gear ground locks are installed (AMM 09-11-00/201).
S 866-024
(2)
Make sure the wheel chocks are installed.
S 496-017
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3) Do this task: "Installation of the Door Locks on the Wing Landing Gear" (AMM 32-00-30/201).
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32-41-09
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
TUBING TO THE
HYDRAULIC BRAKE
ACCUMULATOR
HYDRAULIC BRAKE ACCUMULATOR
CHARGING EQUIPMENT INSTALLATION
SEE A DIRECT READING
PRESSURE GAGE GAS
CHARGING
VALVE
HYDRAULIC BRAKE ACCUMULATOR CHARGING EQUIPMENT INSTALLATION
A
P1-4 PANEL SEE B
HYD BRAKE HYDRAULIC
PRESS
BRAKE BRAKE
SOURCE
PSI X 1000
PRESSURE GAGE
P1-4 PANEL B
Hydraulic Brake Accumulator Inspection
Figure 601
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32-41-09
ALL ú ú 01 Page 602 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 496-022
(4)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
S 846-003
(5)
Supply electrical power (AMM 24-22-00/201).
D.
Procedure
S 866-018
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.
(1)
Pressurize hydraulic system 4 (AMM 29-11-00/201).
S 716-026
(2)
Do these steps to do a check of the pressure indication devices at the hydraulic brake accumulator:
(a)
Make sure the pressure indication for hydraulic system 4 on the EICAS hydraulic synoptic display is 2900-3150 psi (AMM 31-61-00/001).
