# SDR DALA2021042602410

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 25, 2021
- Submitted: April 26, 2021
- Operation: Air carrier
- Aircraft: [N548US](https://openairdocs.org/aircraft/N548US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26495
- Aircraft time: 77,460 hours, 27,636 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Odor
- Location: Cabin Air
- 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/DALA2021042602410

## Discrepancy

SHIP 5648-ATB/FUME- DUE TO STRONG ODOR/FUME THAT DISSIPATED LATER. AIR RETURN DUE TO SMELL. NO ASSOCIATED EICAS MESSAGE. CORRECTIVE ACTION: INSPECTED CABIN/COCKPIT, RAN PACKS AND RECIRCULATION FANS. NO ODORS PRESENT. C/W NO GO ODI PREVENTION & FIM. CHECKED OPERATION OF EQUIPMENT COOLING SYSTEM. REPLACED HEPA FILTERS & LT RECIRCULATION FAN. ALL CHECKS NORMAL.

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