- Difficulty date
- November 19, 2019
- Submitted
- November 22, 2019
- Operation
- Air carrier
- Make and model
- Boeing 75723A
- Aircraft serial
- 24924
- Aircraft time
- 76,251 hours, 26,486 cycles
- Part
- Controller
- Part number
- 21173886
- Part serial
- 771278
- Condition
- Failed
- Location
- Cabin Pressure
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN AUTOMATIC INOP. UNABLE TO MAINTAIN CABIN ALT IN MANUAL WITH VALVE FULLY CLOSED. REPLACED CABIN PRESSURE OUTFLOW VALVE AND TESTED PER AMM 21-31-03-2, OPS CHECKS GOOD. REPLACED #2 AUTOMATIC PRESSURE CONTROLLER PER AMM 21-31-02-4, OPS CHECKS GOOD.