Service difficulty report · Compensator · Boeing 737890

Difficulty date
November 1, 2012
Submitted
November 5, 2012
Operation
Air carrier
Aircraft
N566AS
Make and model
Boeing 737890
Aircraft serial
35182
Aircraft time
22,477 hours, 6,903 cycles
Part
Compensator
Condition
Failed
Location
Fuel Qty
Stage of operation
TX
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

PRIOR TO PUSH BACK, FUEL QUANTITY READING 23.0, APPROX 10 MINUTES LATER, FUEL READS 22.4. RT MAIN TANK READING 8.56, NOW READS 8.13. ACCOMPLISHED FQIS GROUND TEST , NO CURRENT FAULTS LOGGED. FAULT HISTORY LOGGED CONSECUTIVE FAULTS ON GROUND AND LAST 10 FLIGHTS. OF 28-41108, AND 28-41208 COMPENSATER DATA BAD, BOTH NR1 AND NR2 MAIN TANKS. REF FIM 28-41 TASK 807. ACCOMPLISHED FIM 28-41 TASK 807 THROUGH STEP F(F) AND STEP F(4) THROUGH (6)(B)5. NO FAULTS. RANG OUT NR1 & NR2 TANK COMPS AMM 28-41-21 NR1 127.41 NR2 127.63. TRANSFERRED FUEL SEVERAL TIMES. NO FLUCTUATIONS. SUMPED TANKS, NO WATER FOUND. AFTER TRANSFER - NOTED COMPUTER PROBE WITH IN LIMITS. SYS OPS NORMAL. REF MM 28-41-21. FQIS GROUND TEST PASS.