# SDR HNAA2025081100539

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2025
- Submitted: August 11, 2025
- Operation: Air carrier
- Aircraft: [N905JH](https://openairdocs.org/aircraft/N905JH), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500892
- Aircraft time: 45,066 hours, 41,585 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 8152403
- Part serial: 2004110159
- Condition: Abnormal
- Location: Zone 100
- Part time: 40,665 hours, 37,125 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, B
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2025081100539

## Discrepancy

BLACK SMOKE REPORTED IN CABIN AFTER GRINDING SOUND COMING FROM NR 2 ENG.  BURNT RUBBER SMELL IN FLIGHT DECK. OXYGEN MASKS IN FLIGHT DECK DEPLOYED.      FOUND ACM TO BE FAULTY. R & R #100 ACM IAW AMM 21-51-03. AC OK FOR SERVICE

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