NOTE: This is the capacitance value added to the empty
____ tank capacitance by the test unit to simulate a full tank.
 TANK ADDED CAPACITANCE (pf) No. 1 and 2 *[1] 568.8 Center *[1] 191.0
 No. 1 and 2 *[2] 569.9
 Center *[2]  190.5
 *[1] Fuel quantity indication in pounds
 *[2] Fuel quantity indication in kilograms

 (m)  
Set the FUNCTION switch to CAP SIM 1.

 (n)  
Connect a tee between the test harness wires that have the COAXIAL label.

 (o)  
Connect the tee to the HI-Z COAX receptacle on the system test unit.

 (p)  
Connect a tee between the test harness wires that have the UNSHIELDED label.

 (q)  
Connect the tee to the LO-Z TANK receptacle on the system test unit.

 (r)  
Connect a tee between the test harness wires that have the COMP label.

 (s)  
Connect the tee to the LO-Z COMP receptacle on the test unit.

 (t)  
Set the battery switch to ON.

 S 975-044-003
 (7)  Do a check of the values on the fuel quantity indicators with a full fuel tank.
 (a)  
Connect the test harness to the rear of the fuel quantity indicator.

 (b)  
Close the QTY and the EP GND FUELING circuit breakers, and let the system become warm for five minutes.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ANALOG FUEL QUANTITY ú  28-41-00
 INDICATORS ú CONFIG 3 ú 01A Page 519 (BARFIELD SYSTEM TESTER) ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (c)  Make sure the fuel quantity indicator shows the applicable full value with the applicable tolerance: TANK FULL VALUE
 No. 1 and 2 *[1] Center *[1]  11000 |110 lb16800 |170 lb
 No. 1 and 2 *[2] Center *[2]  5000 |50 kg7600 |80 kg
 *[1] Fuel quantity indication in pounds *[2] Fuel quantity indication in kilograms
 (d) (e) (f)  Write the value shown on the fuel quantity indicator.Open the access door for the refuel control panel (P15).Write the value shown on the applicable refuel quantity indicator.
 (g) (h)  Compare the values on the fuel quantity indicator (in the control cabin) and the refuel quantity indicator (on the P15 panel).The values must be the same with a tolerance of |50 pounds (|20 kilograms).

 S 715-045-003
 (8)  
Do the task, "Operational Test - Fuel Quantity Indicating System".

 S 085-046-003

 (9)  
Remove the test equipment.

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

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

 (c)  
Connect the airplane 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 865-047-003
 (10) Close these circuit breakers and remove the DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel 1) EP GND FUELING 2) QTY
 S 975-048-003
 (11) Do a check of the indicator values 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 for the refuel control panel, if the door is closed.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ANALOG FUEL QUANTITY ú  28-41-00
 INDICATORS ú CONFIG 3 ú 01A Page 520 (BARFIELD SYSTEM TESTER) ú Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (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.
　
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