# SDR UPS01835457

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2001
- Submitted: March 30, 2001
- Operation: Air carrier
- Aircraft: N810UP
- Make and model: Doug DC-8-73F
- Registry model: [Doug DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f) (OpenAirDocs)
- Aircraft serial: 46001
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Contaminated
- Location: Left
- 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/UPS01835457

## Discrepancy

AFTER TAKEOFF AND LEFT PACK TURNED ON, CAUSTIC FUMES FILLED COCKPIT. DECLARED EMERGENCY. RAN FUMES EVAC CHECKLIST WHILE RETURNING TO LAND . AIR TURN BACK.    R & R LEFT WATER SEPARATOR SOCK, INSPECTED R-SOCK FOUND NO DEFECTS. LEFT SOCK FUEL FUME SOAKED.

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