# SDR HNAA2021070600312

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2021
- Submitted: July 6, 2021
- Operation: Air carrier
- Aircraft: [N638AE](https://openairdocs.org/aircraft/N638AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145172
- Aircraft time: 47,890 hours, 44,526 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- 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/HNAA2021070600312

## Discrepancy

COMING THROUGH 31K FEET. STRONG ODER NOTICED IN COCK PIT/CABIN. DISSIPATED GOING BACK THROUGH 31K FEET. OCCURRING INTERMITTENTLY ON DESCENT. COULD DUPLICATE ON GROUND WITH PACKS. INSPECTED RELAY AND DISTRIBUTION BOX PANELS, NO DEFECTS NOTED. R/R'D #2 RE-CIRCULATION FAN. OPS CHECKS GOOD IAW 221-24-01-04.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.