# SDR QXEA2020012800057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 27, 2020
- Submitted: January 28, 2020
- Operation: Air carrier
- Aircraft: N434MK
- Make and model: Bombdr DHC8402
- Aircraft serial: 4227
- Aircraft time: 26,224 hours, 28,482 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 820100007
- Part serial: 20081227742
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 16,457 hours, 17,340 cycles
- 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/QXEA2020012800057

## Discrepancy

CABIN PRESS MASTER WARNING ON CLIMBOUT AT 13500'. UNABLE TO CONTROL PRESSURE IN AUTO & MANUAL. DIVERTED AND ACCOMPLISHED A UNEVENTFUL LANDING. REMOVED FROM SERVICE. REPLACED ECU IAW Q400 AMM TASKS 21-61-01-000-801/400-801 OPS CHECKS GOOD A/C PRESSURIZATION SYS OP CHECKS GOOD IAW Q400 AMM TASK 21-31-00-720-801. RETURNED TO SERVICE.

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