SDR ASAA0954303

Service difficulty report · Unknown · Boeing 737890

Difficulty date: January 25, 2009
Submitted: January 27, 2009
Operation: Air carrier
Aircraft: N559AS
Make and model: Boeing 737890
Aircraft serial: 35178
Aircraft time: 9,231 hours, 2,739 cycles
System (JASC): 2100 · Air Conditioning System
Part: Unknown
Condition: Unknown
Stage of operation: TX
How discovered: V
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

AFTER ARRIVAL ACFT REMAINED PARTIALLY PRESSURIZED OUTFLOW VALVE REMAINED PARTIALLY CLOSED. SWITCH WAS IN AUTO. WITH SWITCH IN MANUAL VALVE MOVED ON COMMAND TO OPEN. GROUNDED YES. PERFORMED FIM TASK 21-31-00-810-801. NO FAULTS FOUND. SYSTEM OPERATES NORMALLY. DCPC BITE PROCEDURE PASSES WITHOUT FAULTS NO HISTORY FOR 30 DAYS. ACFT OK FOR CONTINUED SVC. ACFT REMAINS ETOPS QUALIFIED.