Serious incident to the ATR72 registered OH-ATO and operated by Nordic Regional Airlines on 23/01/2018 at Helsinki [Investigation led by SIA / Finland]

Preliminary data based on the notification from the Finnish authorities:

TWR had earlier cleared three airport maintenance vehicles for snow removal at RWY 22L and its vicinity. TWR cleared FIN3PU for takeoff at RWY 22L when the vehicles still had a valid clearance for snow removal. TWR noticed the situation when FIN3PU was airborne. The precise distance between the vehicles and the aircraft is under investigation.

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General information
Local date	23/01/2018
Responsible entity	Finland - AIB
State or area of occurrence	Finland
Location	AD Helsinki-Vanta
Human consequences	None
Aircraft consequences	None
Occurrence class	Serious incident
File number	BEA2018-0041

Flight Information
Aircraft category	Aeroplane
Operator	Finland - Nordic Regional Airlines Oy
Manufacturer / Model	ATR - ATR72
Aircraft Registration	OH-ATO
State of registry	Finland
Last departure point	Finland - EFHK (HEL) : Helsinki-Vantaa
Planned destination	Latvia - EVRA (RIX) : Riga (Airport)
Flight phase	Take-off
Serial number	977
Operator Type AG
Operation Type	Commercial Air Transport - Passenger

BEA is the French air safety investigation authority for civil aviation. The sole objective of the investigation is to improve air safety. It is intended neither to apportion blame nor to assess responsiblity.