# SDR AALA202604014333

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N179UW](https://openairdocs.org/aircraft/N179UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1521
- Aircraft time: 78,962 hours, 30,746 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Bellows
- Part number: D2157160000000
- Condition: Blown
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604014333

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO TUL DUE TO THE FLIGHT CREW REPORTING THAT THEY LOST PRESSURIZATION AT FL340. THE FLIGHT CREW DESCENDED TO 10, 000 FEET AND REPORTED THAT THE CABIN PRESSURIZATION WAS ERRATIC FOR THE REMAINDER OF FLIGHT. THE AIRCERAFT LANDED SAFELY AT TUL  MAINTENANCE FOUND A BELLOWS ON THE RIGHT-HAND PACK JUST UP STREAM OF THE CONDENSOR BLOWN APART AND REPLACED IT. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLSIHED WITH NO ISSUES NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.