(b)  
Turn the SIMULATORS - COMP knob until the system test unit display shows 41.4 pf.

 NOTE: This is the capacitance value added to the empty
____ tank capacitance by the test unit to simulate a full tank.
 (c)  
Set the CAPACITANCE FUNCTION switch to SIM SET - PROBE.

 (d)  
Turn the SIMULATORS - PROBE knobs until the system test unit display shows the applicable added capacitance in this table:

 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

 (e)  Set the CAPACITANCE FUNCTION switch to IND TEST - A/C + PROBE SIM + COMP SIM.
 S 975-021-001
 (4)  Do a check of the values shown on the fuel quantity indicator with a full 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 on the P6 panel.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ANALOG FUEL QUANTITY ú  28-41-00
 INDICATORS ú CONFIG 1 ú 01A Page 508 (GULL SYSTEM TESTER) ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SYSTEM TESTER
GROUNDED TO AIRPLANE STRUCTURE

CONNECTED TO 115 VOLTS

GULL SYSTEM TESTER

Test Equipment Set-Up for Capacitance Simulation
Figure 503

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ANALOG FUEL QUANTITY ú
 28-41-00 INDICATORS ú CONFIG 1
 ú 01A Page 509 (GULL SYSTEM TESTER) ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (c)  
Let the system become warm for five minutes.

 (d)  
Make sure the fuel quantity indicator shows the applicable full value with the tolerance in this table: TANK FULL VALUE

 No. 1 and 2 *[1] 11000 |110 lb Center *[1] 16800 |170 lb
 No. 1 and 2 *[2] 5000 |50 kg
 Center *[2]  7600 |80 kg
 *[1] Fuel quantity indication in pounds
 *[2] Fuel quantity indication in kilograms

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

 (f)  
Open the access door for the refuel control panel (P15).

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

 (h)  
Compare the values on the fuel quantity indicator (from the control cabin) and the refuel quantity indicator (from the P15 panel). 1) The values must be the same to a tolerance of |50 pounds

 (|20 kgs).
 S 715-022-001
 (5)  
Do the task, "Operational Test - Fuel Quantity Indicating System".

 S 865-055-001

 (6)  
Open the QTY and EP GND FUELING circuit breakers.

 S 085-023-001

 (7)  
Remove the test equipment.

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

 (b)  
Connect the airplane wire bundle to the rear of the fuel quantity indicator.

 (c)  
Install the fuel quantity indicator in the pilots' panel.

 (d)  
Tighten the clamp screw.

 S 865-056-001
 (8)  Close these circuit breakers and remove the DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) QTY
 2) EP GND FUELING

 S 975-024-001
 (9)  Do a check of the values on the fuel quantity indicator with an empty fuel 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)
　
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