SDR 95UAL737024

Service difficulty report · Regulator · Boeing 737322

Difficulty date: March 8, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N398UA
Make and model: Boeing 737322
Aircraft serial: 24673
Engine: Ge CFM56*
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Regulator
Part number: 106200815
Condition: Inop
Location: Nr 2
Stage of operation: CL
Nature of condition: J
Precautionary procedure: A

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

What was found

ON TAKE OFF WITH LEFT PACK INOP, RIGHT PACK WOULD NOT MAINTAIN PRESSURIZATION. CABIN CLIMBED AT 2000 FEET PER MINUTE, REVERTED TO STANDBY MODE. STANDBY MODE WAS NO HELP, TURNED ON APU AND CABIN STILL CLIMBED. REPLACED NUMBER TWO HIGH STAGE REGULATOR. RAN ENGINE, CHECKED OK.