Service difficulty report · Compensator · Boeing 737890

Difficulty date
March 19, 2013
Submitted
March 22, 2013
Operation
Air carrier
Aircraft
N589AS
Make and model
Boeing 737890
Aircraft serial
35686
Aircraft time
20,284 hours, 6,330 cycles
Part
Compensator
Condition
Malfunctioned
Location
Fuel System
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

CRUISE LEVEL FLIGHT, LT MAIN TANK 7.96, R MAIN TANK 8.54. BEGAN CROSSFEED, AFTER 5 MINUTES FUEL QTY INCREASED IN LT MAIN TANK TO 8.27, RT MAIN TANK 8.44. FQUIS BITE TEST GROUND TEST FAILED. TANK 1 COMPENSATOR DATA BAD. INFLIGHT FAULTS LOGGED FAULT CODE 28-41108 24 TIMES. TANK 2 LOGGED CODE 28-41208 7 TIMES. 44425. TRANSFERRED ALL FUEL FROM NR 1 AND NR 2 TANKS AND SUMPED BOTH DRY. FOUND WATER IN BOTH TANKS. QUANTITIES FOR COMPENSATOR CAP SHOULD BE BETWEEN 57.6 AND 59.2PF IAW MM 28-41-00-730-801 SYSTEM TEST. NR 1 COMP PF IS 59.09 AND NR 2 IS 58.88PF. ALL WITHIN LIMITS. BITE TEST SHOWS PASS IAW FIM 28-41/801.