Smiths Aerospace
Electronic Systems – Malvern
DOC NO.0134ED
MAINTENANCE MANUAL SUPPLEMENT
BOEING B737-100/200/300/400/500
28-41-04
THE FUEL QUANTITY INDICATOR SHOWS ERROR CODE 7
DURING THE SELF-TEST – Replace the DCTU calibration unit on
back of indicator (AMM 28-41-04/401).
THE FUEL QUANTITY INDICATOR SHOWS ERROR CODE 8
DURING THE SELF-TEST – Do the procedure to put the correct data
into the digital calibration trim unit (DCTU) on the rear of the fuel
quantity indicator (AMM 28-41-04/501).
THE FUEL QUANTITY INDICATOR SHOWS ERROR CODE 9
DURING THE SELF-TEST – Replace the fuel quantity indicator
(AMM 28-41-04/401).
THE FUEL QUANTITY INDICATOR SHOWS ERROR CODE 10
DURING THE SELF-TEST – FIG. 108.
THE FUEL QUANTITY INDICATOR SHOWS EXCESSIVE
FLUCTUATIONS – FIG. 109.
NOT OK
NOT OK
NOT OK
NOT OK
NOT OK
OK
CONTINUE
SHEET 3 – VREF TOTALIZER
SHEET 4 – FMCS
SHEET 5 – PDCS
Troubleshooting for the Fuel Quantity Indicating System
Figure 101 (Sheet 2)
Page 106
April 19/02
Airplanes with Smiths 2307 Model Fuel Quantity
Indicators with TSU
EFFECTIVITY
