(n)
Connect a T connection between the test harness wires that have the COAXIAL label.
(o)
Connect the T connection to the HI-Z COAX receptacle on the test unit.
(p)
Connect a T connection between the test harness wires that have the UNSHIELDED label.
(q)
Connect the T connection to the LO-Z TANK receptacle on the test unit.
(r)
Connect a T connection between the test harness wires that have the COMP label.
(s)
Connect the T connection to the LO-Z COMP receptacle on the test unit.
(t)
Set the battery switch to ON.
S 975-021-003
(4) Do a check of the values on the fuel quantity indicators with a full tank.
(a)
Connect the test harness to the rear of the fuel quantity indicator.
(b)
Close the QTY and EP GND FUELING circuit breakers and let the system become warm for five minutes.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
28-41-02 QUANTITY INDICATORS ú CONFIG 3
ú 03 Page 511 (BARFIELD SYSTEM TESTER) ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
FUEL QUANTITY
TO COMPENSATOR
THUMBWHEELS CONTROL KNOB D.F.
BARFIELD SYSTEM TESTER
Test Equipment Set-Up for Capacitance Simulation
Figure 503
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
28-41-02 QUANTITY INDICATORS ú CONFIG 3
ú 04 Page 512 (BARFIELD SYSTEM TESTER) ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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] | 11000 |110 lb | ................................................ | Center *[1] | 16800 |170 lb | ................................................ | No. 1 and 2 *[2] | 5000 |50 kg | ................................................ | Center *[2] | 7600 |80 kg | 2.........................…....................1 *[1] Fuel quantity indication in pounds *[2] Fuel quantity indication in kilograms
(d)
Write the value shown on the fuel quantity indicator.
(e)
Open the access door, 6540, for the refuel control panel (P15).
(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 715-022-003
(5)
Do this task: "Operational Test - Fuel Quantity Indicating System".
S 085-023-003
(6)
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 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 865-024-003
(7) Close these circuit breakers and remove the DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) QTY
2) EP GND FUELING
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SIMMONDS DIGITAL FUEL ú
28-41-02 QUANTITY INDICATORS ú CONFIG 3
ú 03 Page 513 (BARFIELD SYSTEM TESTER) ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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