(b)
Push the NEXT PAGE key until you find all the GROUND TEST MSG pages.
(c)
Make a list of all the CMCS messages, CMCS message numbers, and ATA numbers that show on the GORUND TEST MSG pages.
(d)
Go to the CMCS Message Index of the Fault Isolation Manual (FIM) to find the corrective action for each CMCS message.
F. Put the Airplane in its Usual Condition
S 865-094
(1) Remove the electrical power, if it is not necessary
(AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-31-00
ALL ú ú 05 Page 504 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 21-31-00-735-011
4. System Test - Cabin Pressure Control System___________________________________________
A. Standard Tools and Equipment
(1) Vacuum source 20-30 inches Hg
B. Special Tools and Equipment
(1)
AIRPLANES WITH GENERAL ELECTRIC ENGINES; G21001-11, Lockout Actuator - N2 Speed Card Test Switch
(2)
AIRPLANES WITH ROLLS ROYCE ENGINES; G21001-11, Lockout Actuator - N3 Speed Card Test Switch
(3)
G21002-30, Breakout Box - ICU Altitude Switch
(4)
G21004-1, Vacuum Harness - Cabin Pressure Controller
C. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 31-61-00/201, Integrated Display System
(3)
AMM 32-09-02/201, Air/Ground Relay System
D. Access
(1) Location Zone 221, 222, Control Cabin 117, 118, Electrical and Electronics Compartment 115, Area between Nose Gear Wheel Well and Fuselage, LH 151, Area Aft of Bulk Cargo Compartment, LH 152, Area Aft of Bulk Cargo Compartment, RH
E. Prepare for the Procedure
S 715-125
(1)
Do the Cabin Pressure Control System (CPCS) Ground Test (AMM 21-31-00/501).
S 715-126
(2)
Do the Overboard Valve System Ground Test (AMM 21-31-00/501).
F. CPCS Manual Mode System Test
S 865-013
(1)
Supply electrical power (AMM 24-22-00/201).
S 715-015
(2)
Make sure that the left outflow valve operates in manual mode:
(a) Monitor the left and right outflow valve position indicators on the EICAS ECS synoptic page. 1) Make sure that both indicators point to the full open
position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-31-00
ALL ú ú 07 Page 505 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
2) Make sure that AUTO shows below each indicator.
(b)
Push the MAN L switch on the CPCS selector panel to ON. 1) Make sure that the EICAS advisory message OUTFLOW VLV L shows.
2) Make sure that MAN shows on the EICAS ECS synoptic page below the left outflow valve position indicator.
(c)
Hold the OPEN CLOSE switch on the CPCS selector panel to the CLOSE position. 1) Make sure that the left outflow valve position indicator on
the ECS synoptic page moves to the fully closed position. 2) Make sure that the left outflow valve position indicator on the CPCS selector panel moves to the fully closed position. 3) Release the OPEN CLOSE toggle switch.
(d)
Hold the OPEN CLOSE toggle switch to the OPEN position until the left outflow valve position indicator on the EICAS ECS maintenance page is between 0.95 and 1.00. 1) Make sure that the left outflow valve position indicator on
the CPCS selector panel is in the fully open position. 2) Release the OPEN CLOSE toggle switch. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747-400 AMM 飛機維護手冊 空調 AIR CONDITIONING 1(104)
