# SDR AALA202510245726

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 2025
- Submitted: October 24, 2025
- Operation: Air carrier
- Aircraft: [N151AN](https://openairdocs.org/aircraft/N151AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6840
- Aircraft time: 30,122 hours, 11,979 cycles
- Engine: Iae V2533A5
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Solenoid
- Part number: 341E030000
- Part serial: 02201
- Condition: Defective
- Location: Bleed Valve
- Part time: 29,199 hours, 15,869 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202510245726

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED THAT THE NR 2 ENGINE WAS SURGING BETWEEN 1.40-1.43 ABOUT ONCE A SECOND. FUEL FLOW FLUCTUATES 100 PPH. ENGINE 2 BLEED PRESSURE 14-38. N1 81.8-83.3. N2 STABLE. N1 VIB 0.7. MAINTENANCE REPLACED THE #2 ENGINE BLEED PRESSURE REGULATOR VALVE CONTROL SOLENOID PER AMM 36-11-55. (AALA202510245726) AND THE #2 ENGINE BLEED PRESSURE REGULATOR VALVE PER AMM 36-11-52. (AALA202510240305) A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED 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.