(c)
P414 Main Power Distribution Panel
1) 414G23 HYD 4 PRESS IND
S 862-038
(3)
Push the FUEL switch on the EICAS display select panel.
S 862-236
(4)
Do a check to determine the amount of fuel in the fuel tanks.
NOTE: If there is sufficient fuel in the applicable tank, there is
____ no time limit on the operation of the hydraulic pump. If there is less fuel than the quantities below, then the hydraulic pump operation is limited to 15 minutes.
NOTE: The fuel weight values given below are found on a
____ specified fuel density of 6.7 pounds for a gallon (0.802 Kg for a liter).
(a)
For system No. 1, there must be 2000 pounds (900 KG) of fuel in the No. 1 main tank.
(b)
For system No. 2, there must be 5400 pounds (2450 KG) of fuel in the No. 2 main tank.
(c)
For system No. 3, there must be 5400 pounds (2450 KG) of fuel in the No. 3 main tank.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 214 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(d) For system No. 4, there must be 2000 pounds (900 KG) of fuel in the No. 4 main tank.
(5) S 862-039Push the HYD switch on the EICAS display select panel. (a) Make sure the synoptic display shows the shutoff valve for the hydraulic supply of the applicable system is open. (b) If it is necessary, push the applicable fire handle to open the shutoff valve for the hydraulic supply.
(6) S 862-040Pressurize the pneumatic system with a ground air source or the APU (AMM 36-00-00/201).
(7) S 862-041Push the HYD switch on the EICAS display select panel.
(8) S 862-042Make sure the applicable HYD PUMPS ENGINE switch on the P5 panel is in the ON position.
S 862-514
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL THE
_______ CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. THE AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THE THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
CAUTION: DO NOT OPERATE THE PUMPS IN A HYDRAULIC SYSTEM IF THE SYSTEM IS
_______ TOO HOT. DAMAGE TO THE PUMPS CAN OCCUR.
CAUTION: THE HEAT EXCHANGERS IN THE HYDRAULIC SYSTEM USE FUEL TO REMOVE
_______ HEAT FROM THE HYDRAULIC FLUID. DO NOT OPERATE A HYDRAULIC PUMP FOR MORE THAN 15 MINUTES IF THERE IS NOT SUFFICIENT FUEL FOR THE OPERATION. DAMAGE TO THE PUMP CAN OCCUR.
CAUTION: DO NOT OPERATE A HYDRAULIC SYSTEM FOR 20 MINUTES AFTER A SYSTEM
_______ BECOMES TOO HOT. OPEN THE FAIRING DOORS ON THE TRAILING EDGE OF THE STRUT IF THE AIR TEMPERATURE IS MORE THAN 100°F (37°C). DAMAGE TO THE SYSTEM CAN OCCUR IF YOU DO NOT LET IT BECOME COOL.
(9)
Start the engine to operate the EDP (AMM 71-00-00/201).
S 862-044
(10)
When you complete the hydraulic power operation, stop the engine operation (AMM 71-00-00/201).
(a)
Keep the HYD PUMPS ENGINE switch in the ON position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 215 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 862-045
(11)
Release the pressure in the hydraulic system (Ref par. 5).
S 862-046
(12)
Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 862-047
(13)
Remove electrical power if it is not necessary for other operations (AMM 24-22-00/201).
TASK 29-11-00-862-483
5. Hydraulic System Pressurization with an Auxiliary AC Hydraulic Pump
___________________________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 36-00-00/201, Pneumatic System
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 液壓 HYDRAULIC 1(27)
