# SDR 7SJA2018112100041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2017
- Submitted: November 21, 2017
- Operation: Air carrier
- Aircraft: [N661JM](https://openairdocs.org/aircraft/N661JM), registered now
- Make and model: Emb EMB-135BJ
- Registry model: [EMB EMB-135BJ](https://openairdocs.org/model/embraer-emb-135bj) (OpenAirDocs)
- Aircraft serial: 1450730
- Aircraft time: 9,230 hours, 4,576 cycles
- Engine: Rroyce AE3007A1E
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Part number: 8151132
- Condition: Unsecure
- 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/7SJA2018112100041

## Discrepancy

ENROUTE,  THE AIRCRAFT EXPERIENCED A CABIN ALTITUDE CLIMB UNABLE TO HOLD CABIN ALTITUDE. AIRCRAFT DESCENDED AND RETURNED TO DEPARTURE.  FOUND THE A/C PACK UNSECURE.

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