# SDR ABXA2022060765

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2022
- Submitted: June 9, 2022
- Operation: Air carrier
- Aircraft: [N220CY](https://openairdocs.org/aircraft/N220CY), registered now
- Make and model: Boeing 767
- Registry model: [Boeing 767](https://openairdocs.org/model/boeing-767) (OpenAirDocs)
- Aircraft serial: 24729
- Aircraft time: 95,493 hours, 16,982 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: None
- Condition: None
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA2022060765

## Discrepancy

AT FL380 CABIN ALT WARNING AND HORN WENT ON, CABIN ALT APPROX 12000 FT MODE SELECT AUTO 1 CREW ELECTED TO PERFORM AN AIR TURN BACK. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. AIRCRAFT GROUNDED BY MAINTENANCE . MAINTENANCE DEFERRED PRESSURIZATION SYSTEM CONTROLLER #1 IAW MEL 21-31-1A. AIRCRAFT RETURNED TO SERVICE.

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