# SDR DALA2026041302322

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N955DZ](https://openairdocs.org/aircraft/N955DZ), registered now
- Make and model: Boeing 737-9GPER
- Registry model: [Boeing 737-9GPER](https://openairdocs.org/model/boeing-737-9gper) (OpenAirDocs)
- Aircraft serial: 38743
- Aircraft time: 29,809 hours, 17,014 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Sleeve
- Condition: Damaged
- Location: Lt A/C Pack
- 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/DALA2026041302322

## Discrepancy

AFTER TAKEOFF, UNABLE TO PRESSURIZE AIRCRAFT. CONTINUED TO ATL AT LOWER ALTITUDE AND DECLARED AN EMERGENCY.   FOUND LEFT PACK CONDITIONED AIR CHECK VALVE FLEXIBLE SLEEVE DAMAGED. REPLACED SAME. OPS CHECK GOOD. (LOG 8313806 - AIRCRAFT WAS GROUNDED).

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