# SDR DALA2018011700258

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 15, 2018
- Submitted: January 17, 2018
- Operation: Air carrier
- Aircraft: N981DL
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 53268
- Aircraft time: 69,636 hours, 51,181 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Faulted
- Location: Cabin Pressure
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2018011700258

## Discrepancy

LOST PRESSURIZATION AT FL 310 BOTH AC PACKS IN AUTO. BOTH 1 AND 2 AUTO PRESSURE CONTROLLERS SHOWED "INOP" ANNUNCIATION. PERFORMED AUTO PRESS CONTROLLER BITE. FOUND BOTH CONTROLLERS FAULTED. RESET CONTROLLERS.  AIRCRAFT WAS RETURNED TO SERVICE.

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