# SDR AALA202606282201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 24, 2026
- Submitted: June 28, 2026
- Operation: Air carrier
- Aircraft: [N461AN](https://openairdocs.org/aircraft/N461AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 11059
- Aircraft time: 14,888 hours, 4,082 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Pressure Switch
- Condition: Faulted
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202606282201

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHX DUE TO THE FLIGHT CREW REPORTING A YELLOW HYDRAULIC SYSTEM RESERVOIR LOW CAUTION ECAM MESSAGE IN FLIGHT. THE AIRCRAFT LANDED SAFELY AT PHX AND TAXIED TO THE GATE UNDER ITS OWN POWER.  MAINTENANCE REPLACED THE LOW-LEVEL SWITCH FOR THE YELLOW HYDRAULIC RESERVOIR PER AMM 29-31-41-000-004-A AND ACCOMPLISHED A SATISFACTORY OPS & LEAK CHECK WITH NO ISSUES NOTED.

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