# SDR UIEA2014092600466

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 26, 2014
- Submitted: September 26, 2014
- Operation: Air carrier
- Aircraft: [N419MC](https://openairdocs.org/aircraft/N419MC), registered now
- Make and model: Boeing 747-48EF
- Registry model: [Boeing 747-48EF](https://openairdocs.org/model/boeing-747-48ef) (OpenAirDocs)
- Aircraft serial: 28367
- Aircraft time: 79,416 hours, 13,544 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7968842007
- Part serial: 86072130
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: NR
- 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/UIEA2014092600466

## Discrepancy

ITEM 1 OUT FLOW VLV R EICAS MSG DISPLAYED.  MANUAL PRESSURIZATION CONTROL ONLY.  ITEM 2 EICAS MSG CABIN ALT AUTO.  ITEM 1 CMC BITE SHOWS CPCS OUTFLOW VLV R, ACTUATOR & MOTOR FAIL MSG 21208.  PULLED & RESET CABIN PRESS ICU RT CB C3166.  REPLACED CHANNEL B CPCS M7949.  PERFORMED CABIN PRESS TEST IAW MM 21-31-01 SYS PASSED.  ITEM 2 SEE LOG PG 662158 FOR CORRECTIVE ACTION.  PERFORMED CABIN ALT AUTO IAW MM 21-31-01 SYS PASSED.

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