# SDR AALA202607286048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: July 28, 2026
- Operation: Air carrier
- Aircraft: [N170US](https://openairdocs.org/aircraft/N170US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1462
- Aircraft time: 79,839 hours, 31,109 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Switch
- Part number: D90ST2004000
- Condition: Illuminated
- Location: Hyd Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607286048

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED INTO CLT DUE TO THE FLIGHT CREW REPORTING THAT AFTER DEPARTURE ECAM: YELLOW RESERVOIR LOW LEVEL. THE FLIGHT CREW FOLLOWED ECAM PROCEDURE AND TURNED OFF PTU AND YELLOW ENGINE 2 HYDRAULIC PUMP. THE GREEN AND BLUE HYDRAULIC SYSTEMS WERE NORMAL. THE AIRCRAFT LANDED SAFELY AT CLT AND TAXIED TO THE GATE UNDER ITS OWN POWER.    MAINTENANCE REPLACED THE YELLOW RESERVOIR LOW LEVEL SWITCH PER AMM 29-13-41 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.

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