# SDR AALA202107127907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2021
- Submitted: July 12, 2021
- Operation: Air carrier
- Aircraft: [N970UY](https://openairdocs.org/aircraft/N970UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3924
- Aircraft time: 41,395 hours, 14,964 cycles
- System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560)
- Part: Diaphragm
- Condition: Damaged
- Location: L4 Assist Bottle
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202107127907

## Discrepancy

AIRCRAFT WAS GROUNDED: 4L-DOOR ASSIST BOTTLE PRESSURE WARNING ON FLIGHT ATTENDANT CABIN INTERCOMMUNICATION DATA SYSTEM PANEL. REMOVED AND REPLACED DIAPHRAGM IN PERCUSSION MECHANISM OF DOOR DAMPER AND EMERGENCY OPERATION CYLINDER OF 4L DOOR PER AMM 52-10-00-610-001-A.

---
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.