# SDR DALA2020021421157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2020
- Submitted: February 14, 2020
- Operation: Air carrier
- Aircraft: [N591NW](https://openairdocs.org/aircraft/N591NW), registered now
- Make and model: Boeing 757351
- Aircraft serial: 32991
- Aircraft time: 59,863 hours, 19,625 cycles
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Bypass Valve
- Condition: Leaking
- Location: Slat System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2020021421157

## Discrepancy

SHIP 5811 -FUME- A OILY DIRTY SOCK ODOR WAS REPORTED IN THE COCKPIT AND CABIN, O2 MASKS WERE DONNED. CORRECTIVE ACTION: FOUND SLAT BYPASS VALVE LEAKING INTO (L) PACK BAY, SECURED LINE, CLEANED PACK BAY OP CHECKS NORMAL. C/W REMOVAL OF OIL CONTAMINATION IN A/C SYSTEM PER B757 AMM 21-00 AND REPLACED RECIRC FILTERS. NO ODOR PRESENT.

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