# SDR 9WGA202109151301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2021
- Submitted: September 15, 2021
- Operation: Air carrier
- Aircraft: [N513SN](https://openairdocs.org/aircraft/N513SN), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48513
- Aircraft time: 85,900 hours, 14,329 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Condition: Malfunctioned
- Stage of operation: CR
- 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/9WGA202109151301

## Discrepancy

PACK 3 OFF DURING FLIGHT "CABIN AIRFLOW LOW" DURING CRUISE AND DESCENT UNTIL CABIN REGULATED ITSELF. CABIN NOT HOLDING CABIN PRESSURE AT ALTITUDE.

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