31-41-00
ALL ú ú 08A Page 1 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
CALIBRATION
MODULE
PITCH
ATTITUDE SEE C
SENSOR
SEE A
WEIGHT AND BALANCE
COMPUTER
SEE B
PITCH ATTITUDE SENSOR
A
LED DISPLAY
TEST PUSHBUTTON
WEIGHT AND BALANCE COMPUTER CALIBRATION MODULE BC
Weight and Balance System - Component Location
Figure 1 (Sheet 1)
C80007
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
31-41-00
ALL ú ú 04A Page 2 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE D
SEE E
FWD
SEE F NOSE GEAR (INSIDE AXLE) LOAD SENSOR
D
MOUNTING BRACKET E ARE MOUNTED INSIDE A PROTECTIVE COVER ON WHEEL TRUCK LUGS MAIN GEAR LOAD SENSORS
LOAD SENSOR
F
Weight and Balance System Component Location
Figure 1 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
31-41-00
ALL ú ú 01A Page 3 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
REMOTE DEDICATED DISPLAY UNIT
Weight and Balance System - Component Location
Figure 1 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
31-41-00
ALL ú ú 09A Page 4 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
M48450
A
747-400
MAINTENANCE MANUAL
4. Calibration Module
__________________
A. The calibration module is used by the WBC as a data storage device. The CM stores information on airplane type, tail number, and landing gear calibration figures for later use by the computer. Information stored in the CM will not be lost when power is removed from the system.
B. Since all system calibration data is stored in the CM, the WBC can be replaced without recalibrating the system.
C. The CM is located in the main equipment center on shelf E2-4 next to the WBC. The CM receives power from the WBC.
5. Weight and Balance Computer
___________________________
A. The WBC uses input signals from the load sensors and pitch attitude sensor to compute airplane gross weight and center of gravity. It also uses individual and total tank fuel quantity inputs to calculate zero fuel weight and zero fuel center of gravity. The WBC is installed in the main equipment center on shelf E2-4.
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 指示/记录系统 1(80)