# SDR 7GMB1153101220161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2016
- Submitted: October 14, 2016
- Operation: Air carrier
- Aircraft: N286SJ
- Make and model: Emb EMB-145XR
- Registry model: [EMB EMB-145XR](https://openairdocs.org/model/embraer-emb-145xr) (OpenAirDocs)
- Aircraft serial: 14501153
- Aircraft time: 4,036 hours, 3,233 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Tube
- Part number: 14553085419
- Part serial: NSN
- Condition: Loose
- Part time: 4,036 hours, 3,233 cycles
- Stage of operation: CL
- 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/7GMB1153101220161

## Discrepancy

CLIMBING THROUGH FL180, THE CREW BEGAN TO NOTICE ODD ODOR IN THE COCKPIT AND THE CABIN, WITH THIN HAZE/SMOKE VISIBLE. THE CREW STARTED A DESCENT AND THE HAZE/SMOKE DISSIPATED. THE CREW TURNED BACK AND MADE AN UNSCHEDULED LANDING AT THE DEPARTURE AIRPORT. THE AIRCRAFT LANDED SAFELY. MAINTENANCE INVESTIGATED AND IT WAS FOUND THAT B-NUT ON SERVO TUBE ASSY ON THE Y-DUCT ON RIGHT PACK BAY WAS LOOSE AND LEAKING AND THE INSULATION WAS MELTED. INSPECTED THE PACK BAY AND SURROUNDING AREA, NO FURTHER DAMAGES WERE FOUND.

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