# SDR AALA991301

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N1425A](https://openairdocs.org/aircraft/N1425A), registered now
- Make and model: Fokker F.28 MK 0100
- Registry model: [Fokker F.28 MK 0100](https://openairdocs.org/model/fokker-f-28-mk-0100) (OpenAirDocs)
- Aircraft serial: 11408
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21185266
- Condition: Defective
- Location: E/E Compt
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA991301

## Discrepancy

DFW - FLT 711 - EN ROUTE DFW-COS, AT FL310 CABIN PRESSURE CONTROL CHANGE MESSAGE ILLUMINATED ON MFDU.  MANUAL PRESSURIZATION CONTROL WAS SELECTED BUT CABIN PRESSURE CONTINUED TO CLIMB.  EMERGENCY DESCENT ACCOMPLISHED TO 10,000 FT.  PASSENGER OXYGEN MASKS WERE DROPPED DURING DESCENT.  AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT.  REPLACED NR 1 CABIN PRESSURE CONTROLLER.  NR 2 CABIN PRESSURE CONTROLLER ALSO REPLACED AS A PRECAUTION.  REPLACED OXYGEN CANISTERS AND REPACKED OXYGEN MASKS.  SYSTEM GROUND CHECKED NORMAL OPERATION.  (M)

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