What was found
IN ALT PRESSURIZATION MODE AUTO FAIL LIGHT ILLUMINATED CABIN CLIMBING/DESCENDING ERRATICALLY. PSID IN ORANGE RANGE. REMOVED AND REPLACED OUTFLOW VALVE IAW TASK 21-31-03-000-801, 21-31-03-400.
- Difficulty date
- April 20, 2007
- Submitted
- April 23, 2007
- Operation
- Air carrier
- Aircraft
- N16709
- Make and model
- Boeing 737724
- Aircraft serial
- 28779
- Aircraft time
- 29,496 hours, 9,576 cycles
- System (JASC)
- 2133 · Pressure Regulator/Outflow Valve
- Part
- Outflow Valve
- Part number
- 9510504
- Condition
- Malfunctioned
- Location
- Cabin Pressure
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.