# SDR AALA202606153874

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2026
- Submitted: June 15, 2026
- Operation: Air carrier
- Aircraft: [N572UW](https://openairdocs.org/aircraft/N572UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5899
- Aircraft time: 39,865 hours, 16,224 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Servo Valve
- Part number: E213300001
- Condition: Faulted
- Location: Zone 600
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202606153874

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED ON APPROACH INTO BNA DUE TO THE FLIGHT CREW REPORTING A "ALT R RELEASED"ECAM ON FINAL APPROACH. THE FLIGHT CREW ACCOMPLISHED A MISSED APPROACH IN ORDER TO ACCOMPLISH THE APPROPRIATE CHECKLIST. THE AIRCRAFT LANDED SAFELY AT BNA WITHOUT FURTHER INCIDENT. MAINTENANCE RETRIEVED TROUBLESHOOTING DATA OF THE BSCU FOUND BRK ALTN SERVOVLV MSG(98GG)/ABCU(95GG). TROUBLESHOOT MSG IAW TSM 32-43-00-810-825. AFTER PERFORMING OPS CHECK TO START THE FUNCTIONAL TEST OF THE ALT BRAKING AUTOMATICALLY, FAULT NOT PRESENT. CONTINUED T/S PER TSM. CHECKED APTR VALUE, FOUND TO BE WITHIN LIMITS AT 2080PSI. DUE TO THE HISTORY, REMOVED AND REPLACED R SERVO VALVE ALTN BRK (98GG) IAW AMM 32-43-35. OPS AND LEAK CHECK GOOD. REPERFORMED OPS CHECK TO START THE FUNCTIONAL TEST OF THE ALT BRAKING AUTOMATICALLY, FAULT STILL NOT PRESENT. A/C OK FOR SERVICE.

---
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.