# SDR AALA201603299014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2016
- Submitted: March 29, 2016
- Operation: Air carrier
- Aircraft: N278AY
- Make and model: Airbus A330-323
- Registry model: [Airbus A330-323](https://openairdocs.org/model/airbus-a330-323) (OpenAirDocs)
- Aircraft serial: 388
- Aircraft time: 69,571 hours, 9,725 cycles
- Engine: Pwa PW4158
- Engine time: 62,284 hours, 9,136 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Check Valve
- Part number: C1436202
- Part serial: 1056
- Condition: Defective
- Location: Zone 400
- Part time: 21,294 hours, 3,042 cycles
- Stage of operation: CR
- 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/AALA201603299014

## Discrepancy

AIRCRAFT WAS GNDED.  NR 2 ENG STALLS, FIVE HRS INTO FLT HAD BEEN AT FL400, REC MAX 409 FOR ABOUT 5 MIN WITH NO TURB & GOT NUMEROUS NR 2 ENG STALL ECAM WARNINGS.  ENG WOULD GO TO IDLE, ECAM WARNING WOULD DISAPPEAR & ENG WOULD ACCELERATE TRIGGERING THE WARNING AGAIN.  ACCOMPLISHED ENG STALL, NOT DISPLAYED ON ECAM, QRH PROCEDURE WHILE DESCENDING TO FL300, AT FL300 BOTH ENG INDICATIONS WERE NORMAL & STABLE.  REPLACED THE NR 2 ENG FUEL PUMP, FUEL DIFFERENTIAL PRESS SWITCH & FUEL METERING UNIT IAW AMM 73-11-11 & 73-21-12.  THE NR 2 ENG LT & RT 8TH STAGE CHECK VLVS WERE FOUND TO BE FAULTY & WERE REPLACED IAW AMM 36-11-41.  A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

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