# SDR AALA202604085007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2026
- Submitted: April 8, 2026
- Operation: Air carrier
- Aircraft: [N509AY](https://openairdocs.org/aircraft/N509AY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3796
- Aircraft time: 57,262 hours, 21,792 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic Line
- Part number: AE7120871
- Condition: Leaking
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604085007

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO MIA DUE TO THE FLIGHT CREW REPORTING THAT INFLIGHT HAD YELLOW HYDRAULIC RESERVOIR GO TO ZERO. COMPLIED WITH ECAM. THE AIRCRAFT LANDED SAFELY AT MIA WHERE IT TOWED TO THE GATE. MAINTENANCE ISOLATED THE SOURCE OF THE LEAK TO THE PTU AND PRESSURE LINE FRANGIBLE FITTING, MAINTENANCE REPLACED THE PTU (AALA202604084859) AND THE PRESSURE LINE (AALA202604082721). 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.