# SDR CALA2017092503323

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2017
- Submitted: September 25, 2017
- Operation: Air carrier
- Aircraft: N505UA
- Make and model: Boeing 757222
- Aircraft serial: 24626
- Aircraft time: 94,837 hours, 27,347 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: NR
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2017092503323

## Discrepancy

VERY STRONG ODOR IN AIR DUCTING. SMELLS LIKE OLD SWEATY SOCKS.  REPLACED BOTH RECIRCULATION FILTERS IAW AMM 21-25-02-404-174, BURNED OUT PACKS. COULD NOT DUPLICATE ODOR.

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