What was found
UNSCHEDULED LANDING. UNABLE TO MAINTAIN CABIN PRESSURE. *S/D* FAILED LEFT FLOW CONTROL VALVE AND A LOOSE APU PNEUMATIC DUCT CLAMP. SECURED LOOSE APU DUCT CLAMP, THEN REPLACED FAILED FLOW CONTROL VALVE.
- Difficulty date
- June 8, 2001
- Submitted
- June 27, 2001
- Operation
- Air carrier
- Aircraft
- N349UA
- Make and model
- Boeing 737322
- Aircraft serial
- 24253
- Aircraft time
- 39,695 hours, 21,098 cycles
- System (JASC)
- 2133 · Pressure Regulator/Outflow Valve
- Part
- Valve
- Part number
- 3964421
- Part serial
- 1680
- Condition
- Failed
- Location
- Cabin Pressure
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.