# SDR DALA2024012000890

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2024
- Submitted: January 20, 2024
- Operation: Air carrier
- Aircraft: [N954DZ](https://openairdocs.org/aircraft/N954DZ), registered now
- Make and model: Boeing 737-9GPER
- Registry model: [Boeing 737-9GPER](https://openairdocs.org/model/boeing-737-9gper) (OpenAirDocs)
- Aircraft serial: 38741
- Aircraft time: 24,160 hours, 12,731 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: UNKNOWN
- Condition: Faulted
- Location: Left A/C Pack
- Stage of operation: DE
- 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/DALA2024012000890

## Discrepancy

SHIP 3954 -PRESS/DE- DECLARED EMERGENCY INTO ATL DUE TO CABIN ALTITUDE WARNING ALERT AT TOP OF DESCENT W/THROTTLES AT IDLE. CORRECTIVE ACTION: MAINTENANCE REMOVED AND INSTALLED FLUSH VALVE PER B737 AMM 32-32. PERFORMED LEFT PACK CONFIDENCE CHECK PER B737 AMM 21-00.

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