What was found
CABIN PRESSURE COULD NOT BE MAINTAINED DURING DESCENT. *S/D* FLOW CONTROL VALVES FAILED. REPLACED LEFT AND RIGHT AIR FLOW CONTROL VALVES.
- Difficulty date
- February 12, 2001
- Submitted
- March 7, 2001
- Operation
- Air carrier
- Aircraft
- N7274U
- Make and model
- Boeing 727222
- Aircraft serial
- 21421
- Aircraft time
- 65,449 hours, 37,223 cycles
- Engine
- Pwa JT8D15
- System (JASC)
- 2133 · Pressure Regulator/Outflow Valve
- Part
- Control Valve
- Condition
- Failed
- Location
- Cabin Pressure
- Component
- Air Flow Cont Vl · Airesrch · 39608831MOD
- Stage of operation
- DE
- 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.