# SDR UIEA2015090700467

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2015
- Submitted: September 8, 2015
- Operation: Air carrier
- Aircraft: N497MC
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29258
- Aircraft time: 67,476 hours, 10,808 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7968842007
- Part serial: 98064404
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 62,670 hours, 10,130 cycles
- Stage of operation: CR
- 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/UIEA2015090700467

## Discrepancy

EICAS MSG, CABIN ALT AUTO, CABIN ALT AUTO B & CABIN ALT AUTO A, AT FL320, 3 HOURS INTO CRUISE, DIVERTED.  R & R CABIN PRESS CONTROLLER A IAW AMM 21-31-02 401.  OPERATIONS CHECKED GOOD IAW SAME AMM REFERENCE.

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