Narrative:

Experienced unidentifiable fumes in the cockpit accompanied by light haze in cabin. Donned mask and goggles and attempted to get through checklist while expediting return to field. Requested priority handling and landed uneventfully. Crash/fire/rescue followed us to ramp and also smelled odor but could not identify the source despite a thorough inspection.

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Original NASA ASRS Text

Title: CE-680 flight crew reported fumes during initial climb. Flight crew executed an uneventful return to departure airport.

Narrative: Experienced unidentifiable fumes in the cockpit accompanied by light haze in cabin. Donned mask and goggles and attempted to get through checklist while expediting return to field. Requested priority handling and landed uneventfully. Crash/fire/rescue followed us to ramp and also smelled odor but could not identify the source despite a thorough inspection.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.