S 975-009-002
(8)
Write the values shown on the refuel quantity indicators.
S 715-010-002
(9)
Set and hold the test switch to TEST GAGES.
S 715-011-002
(10)
Make sure the refuel quantity indicators go to a value of zero.
NOTE: The value on the refuel quantity indicator increases when you
____
set the test switch.
S 715-012-002
(11)
Release the test switch.
S 715-013-002
(12)
Make sure the refuel quantity indicators show the same values that you wrote before this step to a tolerance of |10 pounds (|10 kilograms).
S 415-014-002
(13)
Close the access door for the refuel control panel (P15).
TASK 28-41-00-825-060-002
3. System Trim - Fuel Quantity Indicating System
_____________________________________________
A. Equipment
(1) System test unit (one of the following):
(a)
Model PSD40-1, J. C. Air, 400 Industrial Parkway, Industrial Airport, KS 66031
(b)
Model PSD60-1, -2, -2R; J. C. Air
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
AIRPLANES WITH ANALOG FUEL QUANTITY ú 28-41-00
INDICATORS ú CONFIG 2 ú 02A Page 503 (SIMMONDS SYSTEM TESTER) ú Mar 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(2) Test harnesses (use one of the subsequent):
NOTE:____You must control the quality of the test cables. Make sure the stray capacitance for the test cables is less than
0.2 pf.
(a)
J. C. Air Test Cables and Adapters (recommended): 1) PSD40-503 T-cable 2) PSD40-502 adapter (center tank only) 3) PSD40-502-3 adapter (tanks No. 1 and 2 only) 4) Ground cable
(b)
Boeing test cables with adapters (optional):
1) F72731-119 - center tank
2) F72731-121 - tanks No. 1 and 2
3) Tee connectors:
a) LC-93-03 (Kings Electronics, 40 Marblehead Road, Tuckahoe, NY 10707) - for Lo-Z connections, two are necessary
b) UG274A/U - for Hi-Z connection, one is necessary 4) Adapter cables (fabricated locally):
a) Adapter cables - 50 ohm, unshielded, with polarized BNC plug (Amphenol 14625) to connect to the Lo-Z receptacles of the test unit and polarized BNC jack (Kings LC-33-02) to connect to the tee connector, two are necessary.
NOTE: Shielded cables on Lo-Z connections can
____ cause EMI problems.
b) Adapter cable - 50 ohm, with BNC plug (Amphenol 31-202) to connect to the Hi-Z receptacle on the test unit and a BNC receptacle (AMP 330885) to connect to the tee connector.
5) Ground cable
B. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 28-23-00/201, Defueling
C. Access
(1)
Location Zones
101 Control Cabin, Left
402 Right Wing Outboard Leading Edge
(2)
Access Panels
6540 Refueling Station Access Door
D. Prepare for the Trim
S 865-015-002
(1) Connect the electrical power (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
AIRPLANES WITH ANALOG FUEL QUANTITY ú 28-41-00
INDICATORS ú CONFIG 2 ú 02A Page 504 (SIMMONDS SYSTEM TESTER) ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 655-016-002
(2) Remove the fuel from the fuel tank and 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 to the other tanks.
S 865-017-002
(3) Open these circuit breakers and attach DO-NOT-CLOSE tags:
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