SDR 2000UALA00276

Service difficulty report · Compensator · Boeing 767222

Difficulty date: May 21, 2000
Submitted: October 4, 2000
Operation: Air carrier
Aircraft: N601UA
Make and model: Boeing 767222
Aircraft serial: 21862
Aircraft time: 61,854 hours
Engine: Pwa JT9D7R4D
System (JASC): 2840 · Fuel Indicating System
Part: Compensator
Condition: Failed
Location: Fuel System
Stage of operation: CR
How discovered: O
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 SYSTEM INDICATION PROBLEMS: TOTALIZER READS 3 THOUSAND POUNDS HIGHER THAN CALCULATED. AFTER TAKEOFF CENTER TANK WENT ZERO TO 0.6, LEFT WING 2 THOUSAND HIGHER THAN RIGHT IN CLIMBOUT. IN CRUISE LEFT AND RIGHT WING TANKS INDICATIONS EQUALIZED. DIVERTED TO DEN. *S/D* CHECK OF SYSTEM TANK UNITS FOUND LEFT MAIN TANK UNITS 2, 3, 4, 5 AND COMPENSATOR WITH DEGRADED A TO GROUND RESISTANCE. THE UNITS WERE REPLACED AND THE CENTER TANK DENSITOMETER CONNECTOR WAS CLEANED. FQIS OPERATING NORMAL.