SDR 97UAL900228

Service difficulty report · Outflow Valve · Boeing 737322

Difficulty date: March 20, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N355UA
Make and model: Boeing 737322
Aircraft serial: 24361
Engine: Ge CFM56*
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Malfunctioned
Location: Cabin
Component: Hamilton Sta · 711003
Stage of operation: CL
Nature of condition: O
Precautionary procedure: A

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

What was found

FLIGHT RETURNED TO DENVER DUE TO CABIN PRESSURE PROBLEMS. LANDING WAS NORMAL. *S/D* AIRCRAFT WOULD NOT PRESSURIZE, RT PACK HI, OUTFLOW VALVE CLOSED, IN AUTO OR STANDBY, BOTH BLEEDS ON. USING APU BLEED, NO HELP. REPLACED FORWARD AND AFT OUTFLOW VALVES, OPS CHECK GOOD.