# SDR AALA20110420ORD01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2011
- Submitted: April 21, 2011
- Operation: Air carrier
- Aircraft: [N815NN](https://openairdocs.org/aircraft/N815NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33208
- Aircraft time: 4,667 hours, 1,679 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Dirty
- Location: Cabin
- 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/AALA20110420ORD01

## Discrepancy

ORD - CREW REPORTED STRONG FUMES IN THE CABIN.  EMERGENCY DECLARED FLIGHT RETURNED ORD LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  ACCOMPLISHED PACK BURN AND REPLACED RECIRCULATION FAN FILTERS.  SYSTEM GROUND CHECK NORMAL OPERATION.

---
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.