# SDR HNAA2021060700233

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2021
- Submitted: June 7, 2021
- Operation: Air carrier
- Aircraft: [N637AE](https://openairdocs.org/aircraft/N637AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145170
- Aircraft time: 47,506 hours, 44,663 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Condition: Failed
- Location: Nr 2
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2021060700233

## Discrepancy

IN CRUISE FLT AT FL 250 LIGHT GREY SMOKE AND ELECTRICAL SMELL IN  COCKPIT AND CABIN. FA REPROTED LOUD SQUEALING NOISE COMING FROM PACK 2.  SMOKE AND SMELL ALONG WITH NOISE DISAPPATED WHEN PACK 2 TURNED OFF   MX R&R #2 ACM REF AMM 21-51-03

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