# SDR AALA202507252431

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2025
- Submitted: July 25, 2025
- Operation: Air carrier
- Aircraft: [N165US](https://openairdocs.org/aircraft/N165US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1431
- Aircraft time: 77,074 hours, 29,970 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Hydraulic System
- Condition: Low
- Location: Zone 100
- Stage of operation: AP
- 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/AALA202507252431

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: ON APPROACH, WHEN THE GEAR HANDLE WAS SELECTED DOWN, FLIGHT CREW RECEIVED THE 3 RED UNLOCKED INDICATORS BUT ACTUAL GEAR DEPLOYMENT WAS SEVERELY DELAYED, APPROXIMATELY 10 SECONDS. MAINTENANCE FOUND YELLOW HYDRAULIC QUANTITY LOW AND SERVICED IT PER AMM 12-12-29. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS OR ISSUES NOTED.

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