Smiths Aerospace
Electronic Systems – Malvern
DOC NO.0134ED
MAINTENANCE MANUAL SUPPLEMENT
BOEING B737-100/200/300/400/500
28-41-04
19. Step through all parameters 1 through parameter 11, and record values on DCTU label. Worksheet 1
is also provided for record keeping purposes if so desired. Stop when indicator displays “CAL”.
20. Open “FUEL QUANTITY” circuit breaker.
21. Place “CAL-RUN” jumper in “RUN” mode for Center Tank.
22. Close “FUEL QUANTITY” circuit breaker. Verify the indicator displays full fuel quantity within 1%.
NOTE: For VTO airplanes only, accomplish steps 23 through 25.
23. Reduce fuel quantity in the tank by 20 percent.
24. Fuel tank and allow volumetric shutoff to occur.
25. Verify that fuel level has shut off within .5% of initial setting. If shutoff is unsatisfactory then repeat
calibration procedure.
26. Open P15, Refuel Control Panel and verify that the fuel quantity indicator reads the same as the
cockpit per the following:
Tank
Tolerance
Main 1 & 2
±
20 LB
±
10 KG
Center Wing
±
50 LB
±
30 KG
Aux
±
50 LB
±
30 KG
27. Close P15, Refuel Control Panel.
28. Repeat steps 4.C.2 through 4.C.27 for all other tanks to be calibrated.
CONFIG
4.2
Page 526
July 15/02
Airplanes with Smiths 2307 Model Fuel Quantity Indicators
with TSU
(SIMMONDS SYSTEM TESTER)
EFFECTIVITY