# SDR KY7A202309270038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2023
- Submitted: September 27, 2023
- Operation: Air carrier
- Aircraft: [N677DC](https://openairdocs.org/aircraft/N677DC), registered now
- Make and model: Dorner DO328300
- Aircraft serial: 3126
- Aircraft time: 23,171 hours, 24,155 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KY7A202309270038

## Discrepancy

LOST CPCS AT FL300, AUTO PRESSURIZATION MODE FAILED. REPLACED 2097H020900 OUTFLOW VALUE - AFT PRE FL350 MOD S/N 01214 AND REPLACED 2099J030900 OUTFLOW VALUE - FWD PRE FL350 MOD S/N 01452 BOTH FROM LIEBHERR COMPANY AS REMOVED SERVICEABLE.

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