Narrative:

After takeoff and during initial climb; flight crew noticed an oily and musty fume/odor in the flight deck. The odor dissipated momentarily; but returned and flight crew was concerned since it was from an unknown source. Pilots contacted [the] flight attendant to see if fumes were noticeable in [the] cabin. Flight attendant described a plastic-like odor behind [the] cockpit door and up until row 3 in the cabin. Concerned for the safety of the passengers and crew; pilots decided to make a precautionary landing and return to ZZZ.

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Original NASA ASRS Text

Title: EMB-145 Captain reported an uneventful precautionary air return due to a fume event during initial climb.

Narrative: After takeoff and during initial climb; flight crew noticed an oily and musty fume/odor in the flight deck. The odor dissipated momentarily; but returned and flight crew was concerned since it was from an unknown source. Pilots contacted [the] Flight Attendant to see if fumes were noticeable in [the] cabin. Flight Attendant described a plastic-like odor behind [the] cockpit door and up until row 3 in the cabin. Concerned for the safety of the passengers and crew; pilots decided to make a precautionary landing and return to ZZZ.

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.