# SDR AALA202208241041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2022
- Submitted: August 24, 2022
- Operation: Air carrier
- Aircraft: [N109NN](https://openairdocs.org/aircraft/N109NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5955
- Aircraft time: 29,199 hours, 6,010 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator Valve
- Part number: 6774G010000
- Part serial: 677411680
- Condition: None
- Location: Zone 400 - Nac/P
- Part time: 29,198 hours, 6,010 cycles
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202208241041

## Discrepancy

AIRCRAFT WAS GROUNDED: DUAL BLEED FAULT AFTER TAKEOFF. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAX WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. **ORIGINAL REPORT WAS AALA202208166469** MAINTENANCE REPLACED THE #1 BLEED MONITORING COMPUTER (BMC), REPLACED THE #2 ENGINE HIGH PRESSURE BLEED VALVE PER AMM 36-11-51 (AALA202208247935) REPLACED THE #2 ENGINE PRESSURE REGULATING VALVE PER AMM 36-11-52 (AALA202208241041) AND REPLACED THE #2 ENGINE THERMOSTAT TEMPERATURE LIMITATION SOLENOID PER AMM 36-11-55. (AALA202208247361). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED PER TASK CARDS 26L40036001 AND 26L00071014 WITH NO DEFECTS BEING NOTED ON EITHER ENGINE.

---
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.