Service difficulty report · Probe · Boeing 7673CB

Difficulty date
June 2, 2026
Submitted
June 5, 2026
Operation
Air carrier
Aircraft
N686UA
Make and model
Boeing 7673CB
Aircraft serial
33468
Aircraft time
78,740 hours, 13,626 cycles
Part
Probe
Part number
2008100000202
Part serial
3552
Condition
Faulty
Location
Right
Part time
100,302 hours, 22,467 cycles
Stage of operation
CL
How discovered
L
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FUEL CONFIG LIGHT CAME ON BELOW 1000 FT. RAN CK LST. THEN RT TNK FUEL WENT UP BY 1700 LBS PERFORMED FQIS BITE TEST PER FIM 28-41 TASK 848, FOUND MESSAGE "RM COMPENSATOR CONTAMINATED A01" ON LAST LEG IN FAULT HISTORY. , PERFORMED WIRING CHECK FROM FUEL QTY PROCESSOR UNIT (M121) TO L TANK DENS OUTER TANK CONNECTOR ASSEMBLY (M1945) IAW WDM 28-41-21-1. ALL WIRES CHECKED GOOD. COMPLETED FUEL QTY INDICATOR SYALL MX STEPS AND QC ITEMS C/W SEE PREVIOUS UPDATES

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