# SDR AALA202606301131

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2026
- Submitted: June 30, 2026
- Operation: Air carrier
- Aircraft: [N161UW](https://openairdocs.org/aircraft/N161UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1403
- Aircraft time: 79,523 hours, 30,916 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Bypass Valve
- Part number: 114087005
- Part serial: CWDDDH35900
- Condition: Leaking
- Location: Zone 700
- Stage of operation: CR
- 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/AALA202606301131

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING THE LOSS OF GREEN HYDRAULIC PRESSURE IN FLIGHT FOLLOWED BY YELLOW HYDRAULIC SYSTEM OVERHEAT. THE AIRCRAFT LANDED SAFELY AT DFW AND WAS TOWED TO THE GATE.  MAINTENANCE FOUND THE RT MLG DOOR BYPASS VALVE 2518GM LEAKING HYD FLUID AND REPLACED IT PER AMM 32-31-13.

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