Service difficulty report · Compensator · Boeing 737890

Difficulty date
November 21, 2016
Submitted
November 28, 2016
Operation
Air carrier
Aircraft
N592AS
Make and model
Boeing 737890
Aircraft serial
35190
Aircraft time
33,910 hours, 10,394 cycles
Part
Compensator
Part number
2020201
Part serial
6689
Condition
Failed
Location
Fuel Tank
Part time
18,261 hours, 5,317 cycles
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

RT MAIN TANK FUEL QUANTITY JUMPED AROUND GOING DOWN AS MUCH AS 500LBS, AND STAYING THERE FOR SOMETIME. LATERAL IMBALANCE INDICATION GOT AS MUCH AS 1000LBS AT ONE TIME BUT STEADIED OUT AT 700LBS DIFF BETWEEN L/R MAIN TANKS. AIRCRAFT FUEL TOTALIZED AND FUEL USED WAS SPOT ON THE FLIGHT PLAN. AFTER LANDING MAIN TANK QTS WERE MATCHED. GROUNDED - YES. SUMMARY OF MAINTENANCE AS FOLLOWS: F15, F8, F9, AND F10 IN RIGHT FUEL TANK REMOVED AND REPLACED REF AMM 28-41-21, ELECTRICAL DEACTIVATION, LEAK CHECK, AND INSPECTION REQUIREMENTS REF MIG-2C'S. TANK ENTRY PERMIT DONE ON T/C 78528000. FQIS TEST GOOD REF AMM 28-41-00-730-801 AND PROBES ARE WITHIN TOLERANCE. COMPARISON CHECK DONE REF AMM 28-41-00-720-801 AND CALCULATED FUEL QUANTITY WITHIN TOLERANCE. THIS CLEARS MEL 28-6B AND MEL 28-12B