# SDR IPXA2016090407797

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2016
- Submitted: September 7, 2016
- Operation: Air carrier
- Aircraft: [N154UP](https://openairdocs.org/aircraft/N154UP), registered now
- Make and model: Airbus A300 F4-622R
- Registry model: [Airbus A300 F4-622R](https://openairdocs.org/model/airbus-a300-f4-622r) (OpenAirDocs)
- Aircraft serial: 0840
- Aircraft time: 14,354 hours, 8,921 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2016090407797

## Discrepancy

SHORTLY AFTER DEPARTURE, RECEIVED CABIN PRESSURE REGULATOR FAULT FOLLOWED BY CABIN PRESSURE EXCESSIVE MESSAGE. CREW DECLARED AN EMERGENCY AND RETURNED.  FOUND NR 1 AND NR 2 CABIN PRESSURE CONTROLLERS 105 HM AND 106 HM FAILING TEST OK AND BITE TEST IAW AMM 21-31-00-501. R & R 1 AND NR 2 PRESSURE CONTROLLERS IAW MM 21-31-11-401 TESTS OF SYSTEMS OK, EFF SOURCE REF IPC 21-31-08-03A-010.

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