# SDR DALA2025050503441

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2025
- Submitted: May 5, 2025
- Operation: Air carrier
- Aircraft: [N948DZ](https://openairdocs.org/aircraft/N948DZ), registered now
- Make and model: Boeing 737-9GPER
- Registry model: [Boeing 737-9GPER](https://openairdocs.org/model/boeing-737-9gper) (OpenAirDocs)
- Aircraft serial: 38731
- Aircraft time: 28,312 hours, 15,520 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Part number: 2193301AC
- Part serial: 0996323
- Condition: Inoperative
- Location: Nr 1
- Part time: 28,307 hours, 15,516 cycles
- Stage of operation: CR
- 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/DALA2025050503441

## Discrepancy

SHIP 3948 -PRESS/DE- DECLARED AN EMERGENCY DUE TO CABIN ALTITUDE WARNING PRIOR TO DESCENT WITH LT PACK ON MEL. CORRECTIVE ACTION: REPLACED #2 PACK ZONE TEMP CONTROLLER, #1 CABIN PRESSURE CONTROLLER AND SEVERAL LEAKING FUSELAGE DRAINS. RESTORED LT PACK BY REPLACING LT ACM. OPS CHECK OF BOTH PACKS OK.

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