# SDR SWAA2018092725560

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 26, 2018
- Submitted: September 27, 2018
- Operation: Air carrier
- Aircraft: [N7868K](https://openairdocs.org/aircraft/N7868K), registered now
- Make and model: Boeing 737-79P
- Registry model: [Boeing 737-79P](https://openairdocs.org/model/boeing-737-79p) (OpenAirDocs)
- Aircraft serial: 29364
- Aircraft time: 37,286 hours, 25,584 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2193301AB
- Part serial: 0695987
- Condition: Faulty
- Location: E&E Bay
- Stage of operation: CR
- 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/SWAA2018092725560

## Discrepancy

AIR TURNBACK, AUTO FAIL LIGHT ILLUMINATED ALONG WITH ALT LIGHT.  MOVED THE PRESSURIZATION MODE SELECTOR TO ALT MODE PER THE QRH THE AUTO FAIL LIGHTS KEEPS ILLUMINATED.  WENT TO MAN MODE IN ORDER TO CONTROL THE CABIN.  R&R NR 1 DIGITAL CABIN PRESSURE CONTROLLER

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