# SDR QXEA200602827

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 27, 2006
- Submitted: October 30, 2006
- Operation: Air carrier
- Aircraft: N404QX
- Make and model: Bombdr DHC8402
- Aircraft serial: 4046
- Aircraft time: 13,757 hours, 13,877 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 92146A010401
- Part serial: 0169
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 2,072 hours, 1,875 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA200602827

## Discrepancy

BOI FLIGHT NR 2385 - DURING CLIMB-OUT AT ABOUT 13,000, THE PRESSURE CONTROLLER STARTED TO INCREASE DIFFERENTIAL PRESSURE, BUT THEN STABILIZED.  AT 23,000 ,THE DIFFERENTIAL STARTED AN ABNORMAL DECREASE IN PRESSURE.  ATTEMPTED MANUAL CONTROL WITH NO AFFECT.  PRESSURE WENT TO ZERO.  AIRCRAFT RETURNED TO BOI.  MAINTENANCE REMOVED AND REPLACED CABIN PRESSURE CONTROL PANEL (P/N 92147A020103, S/N 00111) IAW AMM 21-31-01.  REMOVED AND REPLACED CABIN PRESSURE CONTROLLER IAW AMM 21-31-06.  REMOVED AND REPLACED CARGO DOOR SEAL (P/N 52213) IAW 52-31-26.  OPS CHECK NORMAL IAW 21-31-00.  OCF WAS GOOD.  AIRCRAFT RETURNED TO SERVICE.

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