# SDR CA190531005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2019
- Submitted: August 17, 2020
- Operation: General aviation
- Make and model: Bombdr DHC8400
- Engine: Pwc PW150A
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Shutoff Valve
- Part number: 820902DASH6
- Condition: Failed
- Location: Ecs
- Stage of operation: NR
- How discovered: O
- Nature of condition: Z
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA190531005

## Discrepancy

(CAN) CABIN PRESSURE MASTER WARNING CAME ON AT FL 200. DIFF PRESSURE WAS 4 PSI AND DECREASING & CABIN CLIMBING PASSING 10,500`. INITIATED AN EMERGENCY DECENT, CREW WENT ON OXYGEN AND DESCENDED TO BELOW FL 100. AIR TURN BACK PERFORMED. (TC# 20190531005)

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