What was found
DECLARED EMERGENCY, AIR TURNBACK. DURING CLIMB ALTITUDE HORN SOUNDED, CABIN CLIMBING 1000 FPM. STBY NO HELP, WORKED IN MANUAL. REMOVED AND REPLACED AFT OUTFLOW VALVE PER MM.
- Difficulty date
- April 21, 2002
- Submitted
- April 26, 2002
- Operation
- Air carrier
- Make and model
- Boeing 7372H4
- Aircraft serial
- 22731
- Aircraft time
- 63,740 hours, 69,211 cycles
- System (JASC)
- 2133 · Pressure Regulator/Outflow Valve
- Part
- Outflow Valve
- Part number
- 7110033
- Part serial
- 171116
- Condition
- Failed
- Location
- Cabin Pressure
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- B, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.