(11)
Write pressure gage indication immediately.
S 976-043
(12)
AIRPLANES WITH PARKER VALVE 2670005M2/M21/M4/M5 WITHOUT PARKER SB 2670005-32-45; Record the pressure gage reading 15 minutes after depressurizing reservoir.
(a)
Pressure decay must not exceed 8 psi, if pressure decay exceeds 8 psi replace the compensator assembly (AMM 32-51-11/401).
(b)
If the pressure decay exceeds 8 psi after replacement, replace the metering valve assembly (AMM 32-51-04/401).
S 976-037
(13)
AIRPLANES WITH PARKER VALVE 2670005M6, WITHOUT PARKER SB 2670005-32-45; Record the pressure gage reading 15 minutes after depressurizing reservoir.
(a)
Pressure decay must not exceed 15 psi, if pressure decay exceeds 15 psi replace the compensator assembly (AMM 32-51-11/401).
(b)
If the pressure decay exceeds 15 psi after replacement, replace the metering valve assembly (AMM 32-51-04/401).
S 976-038
(14)
AIRPLANES WITH PARKER VALVE 2670005M7, OR WITH PARKER VALVE 2670005M2/M21/M4/M5/M6 WITH PARKER SB 2670005-32-45 INCORPORATED; Record the pressure gage reading 15 minutes after depressurizing reservoir.
(a)
Pressure decay must not exceed 60 psi, if pressure decay exceeds 60 psi replace the compensator assembly (AMM 32-51-11/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-51-04
ALL ú ú 01 Page 604 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(b) If the pressure decay exceeds 60 psi after replacement, replace the metering valve assembly (AMM 32-51-04/401).
S 086-015
(15) Remove the pressure gage, the hose, and the adapter slowly.
NOTE: Bleed off the trapped fluid slowly.
____
S 436-016
(16) Install the aft anticavitation check valve plug.
NOTE: You must make sure the poppet and spring are installed as
____
shown in View B.
S 436-017
(17)
Tighten the plug and lockwire it to the valve (AMM 20-11-28/401).
S 016-018
(18)
Disconnect the nose gear torsion links at the apex (AMM 32-21-03/201).
(a)
Secure the upper torsion link to clear the tires.
S 866-019
(19)
Supply system No. 1 hydraulic power (AMM 29-11-00/201).
S 876-020
(20)
Bleed the nose wheel steering metering valve.
CAUTION: YOU MUST OPEN THE CIRCUIT BREAKERS BEFORE YOU DO THE
_______ PROCEDURE. IF YOU LEAVE THE CIRCUIT BREAKERS OPEN, YOU CAN CAUSE DAMAGE TO EQUIPMENT OR EXCESSIVE EQUIPMENT OPERATING TIME.
(a)
Open the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.
(b)
Open the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.
WARNING: MAKE SURE THE NOSE GEAR DOOR LOCK IS INSTALLED AND THAT
_______ NOSE GEAR GROUND DOOR RELEASE HANDLE IS IN DOWN AND LOCKED POSITION. CHECK THAT LANDING GEAR CONTROL HANDLE IS IN DOWN POSITION. INADVERTENT APPLICATION OF HYDRAULIC PRESSURE CAN CAUSE DOORS TO CLOSE RAPIDLY CAUSING POSSIBLE INJURY.
(c) Bleed the nose wheel steering hydraulic system by steering the nose gear through five complete cycles to the left and to the right.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-51-04
ALL ú ú 01 Page 605 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 866-021
(21)
Remove system No. 1 hydraulic power (AMM 29-11-00/201).
S 866-022
(22)
Close the 7G23 BODY GR STRG ARM AC circuit breaker on the P7 Overhead Circuit Breaker Panel.
S 866-023
(23)
Close the 7G24 BODY GR STRG ARM DC circuit breaker on the P7 Overhead Circuit Breaker Panel.
S 416-024
(24)
Connect the nose gear torsion links at the apex (AMM 32-21-03/201).
S 096-026
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 8(22)
