# SDR UALA2012091005077

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2012
- Submitted: October 16, 2012
- Operation: Air carrier
- Aircraft: [N470UA](https://openairdocs.org/aircraft/N470UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1427
- Aircraft time: 38,257 hours, 16,441 cycles
- Engine: Iae V2527A5
- Engine time: 38,293 hours, 15,530 cycles
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: DE
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012091005077

## Discrepancy

ECAM ENGINE 1 STALL.  ON DESCENT AUTOTHRUST OFF.  ENGINE 1 AT IDLE.  ENGINE 1 ADVANCED ECAM WENT AWAY.  ENGINE 1, PER CREW ON DESCENT 10,000FT, A-THRTL OFF, ENGINES AT IDLE, ENGINE 1 STALL ECAM APPEARED, THROTTLE MOVED FORWARD.  ECAM CLEARED, NO STALL OR SURGE FELT OR HEARD ALL ENGINE INDICATIONS NORMAL.  OPBLM TOMC. 08SEP12.  ACP POWER ASSURANCE CHECK PER JRH 2-40-35, NO MSGS NOTED ON ECAM, NO STALLS HEARD OR FELT.  ACP TSM 71-00-00-810-808.  BOROS GOOD REF PTT 2622002.ST 7A AND B FAILED BLEED VALVE TEST.  REPLACED BOTH VALVES PER MM AND -011A.  BOTH VALVES TEST GOOD.  PERFORMED FUNCTIONAL TEST OF ST 7 114813 SOLENOIDS PER MM.  SOLENOIDS CHECK GOOD.  ALL OTHER CHECKS GOOD.

---
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.