# SDR AALA202104239025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2021
- Submitted: April 23, 2021
- Operation: Air carrier
- Aircraft: [N924US](https://openairdocs.org/aircraft/N924US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6569
- Aircraft time: 19,789 hours, 7,613 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Check Valve
- Condition: Leaking
- Location: Hyd System
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104239025

## Discrepancy

AIRCRAFT WAS GROUNDED: ECAM MESSAGE FOR LOST GREEN HYDRAULIC SYSTEM #1 ENGINE PUMP AND GREEN HYDAULIC SYSTEM LOW PRESSURE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. REPLACED ENGINE # 1 HYDAULIC PUMP DELIVERY CHECK VALVE WHICH WAS LEAKING PER AMM 29-11-36-000-001-A AND 29-11-36-400-001-A. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.

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