SDR ASAA2015121214210

Service difficulty report · Check Valve · Boeing 737890

Difficulty date: December 12, 2015
Submitted: December 14, 2015
Operation: Air carrier
Aircraft: N585AS
Make and model: Boeing 737890
Aircraft serial: 35683
Aircraft time: 31,918 hours, 9,574 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Check Valve
Condition: Slow
Location: Crossfeed
Stage of operation: NR
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

DURING CROSSFEED VALVE CHECK, VERY SLOW TO OPERATE. FIRST ATTEMPT ABOUT 45 SECS TO OPEN AND THEN CLOSE. AFTER THIRD ATTEMPT, OPEN, CLOSE IN 12 SECONDS. ACFT GROUNDED. REF FIM 28-22, TASK 807, CROSSFEED VALVE OPERATES NORMAL. REPLACED ENGINE FUEL FEED ACTUATOR ON CROSSFEED VALVE IAW AMM 28-22-21. OPS CHECK GOOD.