What was found
AIRCRAFT WAS GROUNDED: AUTO PRESSURIZATION AND ALTERNATE FAIL IN FLIGHT. QRH ACCOMPLISHED. AS A PRECAUTION EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED CPC #2 #2 IAW AMM 21-31-01-400-801.
- Difficulty date
- September 21, 2026
- Submitted
- September 24, 2026
- Operation
- Air carrier
- Aircraft
- N917AN
- Make and model
- Boeing 737823
- Aircraft serial
- 29518
- Aircraft time
- 72,346 hours, 30,349 cycles
- System (JASC)
- 2131 · Cabin Pressure Controller
- Part
- Controller
- Part number
- 71211997101AC
- Part serial
- 9652
- Condition
- Inoperative
- Location
- Zone 100
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- G
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.