# SDR K11A2020042972401

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2020
- Submitted: May 5, 2020
- Operation: Air carrier
- Aircraft: [N724CK](https://openairdocs.org/aircraft/N724CK), registered now
- Make and model: Boeing 727225
- Aircraft serial: 20383
- Aircraft time: 63,667 hours, 48,752 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Isolation Valve
- Part number: 20211362
- Part serial: 6910687
- Condition: Defective
- Location: Cabin Pressure
- Stage of operation: CL
- 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/K11A2020042972401

## Discrepancy

PRESSURIZATION SYSTEM FAILED TO PRESSURIZE DURING CLIMB OUT. AIRCRAFT RETURNED TO KCVG FOR UNSCHEDULED LANDING.

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