S 864-037
(9)
Remove electrical power if it is not necessary for other operations (AMM 24-22-00/201).
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29-11-17
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
AIR-DRIVEN PUMP - ADJUSTMENT/TEST
_________________________________
1. General________
A. This subject has one task. This task is an operational test of the air driven pump. It also has an alternate procedure of this task, which uses Dry-Motoring of the engine to test the ADP, in place of using a Hydraulic Ground Cart.
B. It is not necessary to pressurize the reservoir for this test.
TASK 29-11-17-715-001
2. Air-Driven Pump - Operational Test__________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 27-81-00/201, Leading Edge Flap System
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
(4)
AMM 29-11-05/401, Engine-Driven Hydraulic Pump
(5)
AMM 32-09-02/201, Air/Ground Relays
(6)
AMM 36-00-00/201, Pneumatic System
(7)
AMM 54-62-00/201, Nacelle Strut Access Panels
(8)
AMM 73-21-10/401, Fuel Metering Unit
(9)
AMM 71-00-00/201, Power Plant - Maintenance Practices (Operating Procedures)
B.
Access
(1)
Location Zone
221,222 Control Cabin
454 System 1 - Strut Aft Fairing
484 System 4 - Strut Aft Fairing
(2)
Access Panel
454A Trailing Edge Fairing Doors - System 1
484A Trailing Edge Fairing Doors - System 4
C.
Procedure
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-002
S 865-006
WARNING: YOU MUST CAREFULLY FOLLOW THE STEPS IN THE SPECIFIED TASK TO
_______ PREPARE THE SAFETY SENSITIVE SYSTEMS FOR THE AIR MODE. FAILURE TO FOLLOW THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF THE AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Prepare safety-sensitive systems for the air mode simulation (AMM 32-09-02/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-007
WARNING:_______ MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL THE
FLIGHT CONTROL SURFACES, BEFORE YOU OPEN THE FLIGHT CONTROL
SHUTOFF VALVES. THE FLIGHT CONTROL SURFACES CAN MOVE QUICKLY
WHEN YOU OPEN THE FLIGHT CONTROL SHUTOFF VALVES. THIS CAN
CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3) Put the eight WING and TAIL FLT CONTROL SHUTOFF switches, for the hydraulic systems 1 thru 4, to the ON position.
NOTE: These switches are on the P461 panel.
____
S 865-008
(4)
Release the pressure in the hydraulic system (AMM 29-11-00/201).
S 015-009
(5)
Open the doors on the trailing edge fairing (AMM 54-62-00/201).
S 035-010
(6)
Disconnect the pressure hose from the engine-driven pump (EDP) in the applicable hydraulic system (AMM 29-11-05/401).
S 435-011
(7)
Connect the pressure hose of a hydraulic service cart to the EDP pressure hose.
S 215-012
(8)
Make sure the MASTER CAUTION lights, for the captain and the first officer, on the glare shield panel, P10, are on.
S 215-013
(9)
Make sure you can see these messages on the EICAS display: HYD PRESS SYS - (1,2,3,4 as applicable) HYD PRESS DEM - (1,2,3,4 as applicable) HYD PRESS ENG - (1,2,3,4 as applicable)
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