# SDR AALA202507211272

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2025
- Submitted: July 21, 2025
- Operation: Air carrier
- Aircraft: [N759AN](https://openairdocs.org/aircraft/N759AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 32638
- Aircraft time: 11,620 hours, 11,633 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Valve
- Condition: Faulted
- Location: Zone 100
- 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/AALA202507211272

## Discrepancy

AIRCRAFT WAS GROUNDED: 96F IN COCKPIT - NO CHANGE AFTER 40 MINUTES FLIGHT TIME REQUIRING RETURN TO DFW, EMERGENCY DECLARED AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED LOW LIMIT VALVE IAW AMM 21-52-30.

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