(f)  
Write the value shown on the applicable refuel quantity indicator.

 (g)  
Compare the values on the fuel quantity indicator and the refuel quantity indicator. 1) The values must be the same with a tolerance of |20 pounds

 (|20 kilograms).
 S 715-022-002
 (9)  
Do this task: "Operational Test - Fuel Quantity Indicating System".

 S 085-023-002

 (10)
 Remove the test equipment.

 (a)  
Open the QTY and EP GND FUELING circuit breakers.

 (b)  
Disconnect the test harness from the rear of the fuel quantity indicator and the aircraft wire bundle.

 (c)  
Connect the aircraft wire bundle to the rear of the fuel quantity indicator.

 (d)  
Install the fuel quantity indicator in the pilots' panel, and tighten the clamp screw.

 S 865-024-002
 (11) Close these circuit breakers and remove the DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) QTY
 2) EP GND FUELING

 S 975-025-002
 (12) Do a check of the values on the fuel quantity indicator with an empty tank.
 (a)  
Make sure the fuel quantity indicator shows a value of zero with the applicable tolerance: . Tanks No. 1 and 2: +110/-0 lbs (+50/-0 kgs) . Center tank: +170/-0 lbs (+80/-0 kgs)

 (b)  
Write the value shown on the fuel quantity indicator.

 (c)  
Open the access panel, 6540, for the refuel control panel (P15), if the door is closed.

 (d)  
Write the value shown on the applicable refuel quantity indicator.

 (e)  
Compare the values on the fuel quantity indicator and the refuel quantity indicator. 1) The values must be the same with a tolerance of |20 pounds

 (|20 kilograms).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
 28-41-02 QUANTITY INDICATORS ú CONFIG 2
 ú 01 Page 516 (SIMMONDS SYSTEM TESTER) ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 E.  Put the Airplane Back to Its Usual Condition
 S 865-026-002
 (1)  Open these circuit breakers and close them again:
 NOTE: This removes the error codes in the memory of the
____
 indicator.

 (a)  P6 Main Power Distribution Panel
 1) EP GND FUELING
 2) QTY

 S 415-027-002
 (2)  Close the access door, 6540, for the refuel control panel (P15).
 S 865-028-002
 (3) Remove the electrical power, if it is not necessary for other tasks ú (AMM 24-22-00/201).
 TASK 28-41-02-825-029-002
 4.  System Test - Fuel Quantity Indicating System
_____________________________________________
 A.  Special Tools and Equipment
 (1)  
System test unit (one of these units):

 (a)  
Model PSD40-1, J. C. Air, 400 Industrial Parkway, Industrial Airport, KS 66031

 (b)  
Models PSD60-1, -2, -2R: J. C. Air

 (2)  
Test harnesses (use one of these):

 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
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
 28-41-02 QUANTITY INDICATORS ú CONFIG 2
 ú 01.1 Page 517 (SIMMONDS SYSTEM TESTER) ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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