# SDR SIMA20141218003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2014
- Submitted: December 22, 2014
- Operation: Air carrier
- Aircraft: [N634AE](https://openairdocs.org/aircraft/N634AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145150
- Aircraft time: 36,786 hours, 33,589 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20141218003

## Discrepancy

EMERGENCY DECLARED, PACK 2 OVLD, SYS STEADILY CLIMBING AFTER LEVEL AT FL250 RAPID DECENT TO FL 100 STOPPED THE PRESS FROM CLIMBING, CABIN ALT CAME BACK TO NORMAL PRIOR TO LANDING.  PACK 1 MEL'D ERRATIC PRESS SYS AT CRUISE FLIGHT.  TRANSFERRED TO NRWC 634-CMH-01728.  REFER WORK COMPLIED WITH NRWC 634-CMH-01728.  PACK 2 OPERATIONS CHECK GOOD IAW AMM 21-51-00.  R & R DIGITAL CONTROLLER IAW AMM 21-31-01.  CLEANED OUTFLOW VLVS IAW AMM 21-31-03.  REFER AML LG PG 3634307 ITEM 3 FOR PRESSURIZATION AUTO MODE DEFERRAL.

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