Service difficulty report · Outflow Valve · Boeing 757222

Difficulty date
May 13, 2009
Submitted
May 15, 2009
Operation
Air carrier
Aircraft
N565UA
Make and model
Boeing 757222
Aircraft serial
26669
Aircraft time
55,066 hours, 20,410 cycles
Engine
Pwa PW2037
Part
Outflow Valve
Part number
60683218U1
Part serial
421556
Condition
Faulty
Location
Cabin Pressure
Stage of operation
IN
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

EICAS MSG CABIN ALT WARN AND CABIN AUTO INOP LITE ON. SELECTOR IN AUTO 2 SWITCHED TO AUTO 1 NO HELP OPERATING IN MAN OPBLM HANN SAMC TEXT: INFO FL250 CABIN PRESS DIFF 5.1 CAB ALT 8500 BOTH PACKS ON AUTO OUT FLOW VALVE CLSD DUCT PRESS 31 LT AND RT 40. REPLACED BOTH PRESSURE CONTROLLERS AND ACCOMPLISHED POST INSTALLATION TEST; PASSED. REPLACED OUTFLOW VALVE. ACCOMPLISHED POST INSTALLATION TEST, VALVE PASSED.