# SDR SIMA200925401

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2009
- Submitted: September 11, 2009
- Operation: Air carrier
- Aircraft: [N682AE](https://openairdocs.org/aircraft/N682AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500826
- Aircraft time: 13,118 hours, 11,874 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 8152403
- Part serial: 200403046
- Condition: Malfunctioned
- Location: Ac Bay
- Part time: 8,202 hours, 7,165 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA200925401

## Discrepancy

ON FLIGHT 3937 SHORTLY AFTER TAKEOFF THE CREW HEARD A LOUD WHINE AND EXPERIENCED A VIBRATION FOLLOWED BY A HOT SMELL COMING FROM THE NR1 PACK. THE CREW SHUT THE NR 1 PACK OFF AND RETURNED TO ORD.  THE AIRCRAFT WAS REMOVED FROM SERVICE.  REMOVED AND REPLACED THE AIR CYCLE MACHINE IAW EMB 145 AMM 21-51-03.  AIRCRAFT RETURNED TO SERVICE.

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