SDR ASAA1159693

Service difficulty report · Valve · Boeing 737890

Difficulty date: May 26, 2011
Submitted: May 31, 2011
Operation: Air carrier
Aircraft: N517AS
Make and model: Boeing 737890
Aircraft serial: 35197
Aircraft time: 8,977 hours, 2,766 cycles
System (JASC): 2824 · Fuel Transfer Valve
Part: Valve
Part number: 125334D2
Part serial: AA168371
Condition: Out Of Alignment
Location: Fuel System
Part time: 8,977 hours, 2,766 cycles
Stage of operation: CR
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

ONE HOUR AT CRUISE FLT ( FL360 & FL380) NR 1 TANK 730 LB BELOW NR 2 TANK. BOTH READ THE SAME AT TOP OFF CLIMB. NR 1 ENG FF 2.68 NR 2 FF 2.51. AT FL 380 X FEED TO BALANCE NORMAL GROUNDED YES. VERIFIED DISCREPANCY ON GROUND. REALIGNED CROSSFEED VALVE PER AMM 28 22 21 820 801. ACCOMP X FEED VALVE OPS TEST PER AMM 28 22 21 710 801. OPS CHECKED GOOD. ACCOMP X FEED VALVE FUNCTIONAL TEST PER AMM 28 22 00 730 802. NO FUEL TRANSFERRED. GROUND VERIFICATION SUCCESSFUL.