D. Prepare for the Trim
S 865-016-003
(1)
Connect the external electrical power (AMM 24-22-00/201).
S 655-017-003
(2)
Remove all the fuel from the fuel tank, and remove the fuel in the sumps (AMM 28-23-00/201).
NOTE: If you do the trim for only one tank system, you can move
____
the fuel into the other tanks.
S 865-018-003
(3) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) EP GND FUELING
2) QTY
S 485-019-003
(4) Connect the test equipment.
(a)
Remove the fuel quantity indicator from the pilots' panel (Fig. 501).
(b)
Disconnect the electrical connector from the rear of the fuel quantity indicator.
(c)
Connect the test harness to the airplane wire bundle.
(d)
Connect the test harness to the system test unit (Fig. 502).
E. Trim Procedure
S 975-020-003
(1) Measure the empty tank capacitances.
(a)
Set the battery switch on the test unit to ON.
(b)
Push the PRESS TO MEASURE switch and hold it.
(c)
Turn the TANK CAP PF thumbwheels until the meter shows the minimum value.
NOTE: If you turn the thumbwheels to a position farther
____ than the correct position, the value on the meter increases.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
AIRPLANES WITH ANALOG FUEL QUANTITY ú 28-41-00
INDICATORS ú CONFIG 3 ú 01A Page 504 (BARFIELD SYSTEM TESTER) ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
QTY TEST
FUEL QUANTITY
INDICATOR TEST SWITCH
B
Fuel Quantity Indicating System Component Location
Figure 501 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
AIRPLANES WITH ANALOG FUEL QUANTITY ú 28-41-00
INDICATORS ú CONFIG 3
ú 01A Page 505
(BARFIELD SYSTEM TESTER) ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500
MAINTENANCE MANUAL
SEE
BUSSING PLUG SEE
TANK AND COMPENSATOR UNIT BUSSING PLUG
FUEL QUANTITY INDICATING SYSTEM ELECTRICAL CONNECTOR
C
Fuel Quantity Indicating System Component Location
Figure 501 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
AIRPLANES WITH ANALOG FUEL QUANTITY ú 28-41-00
INDICATORS ú CONFIG 3 ú 02A Page 506 (BARFIELD SYSTEM TESTER) ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
DO NOT
FUEL QUANTITY CONNECT
INDICATOR TO COMPENSATOR
AND TANK UNITS
METER
ADJUST ON TESTER
INDICATOR BATTERY
OFF
SWITCH
INS TEST POINTS BATT
TEST GND/HI-Z GND/LO-Z SH/HI-Z SH/LO-Z TEST
FUNCTION GND/SH LOZ/HI-Z COAXIAL
SWITCH
.1 CAP BRIDGE TEST FUNCTION INDICATOR UNSHIELDED
INSULATION 1 CAP SIM
HI-Z RANGE .01 2 TANK CAP pf COAX HI-Z
PRESS TO LO-Z 1 7 4 5 LO-Z
MEASURE TANK
0-10
BUTTON 100 10
GND 1 7 COMP
D.F. COMP
PRESS TO
MEASURE COMP SIM pf
COMP
CAL
SHORTING CAPS TANK CAP INSTALLED 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 燃油 FUEL 3(59)
