The FAA says it has proposed a $777,000 civil penalty against Horizon Air for allegedly opearating 32 Bombardier Dash-8-Q400 turboprops on 49,870 flights when the aircraft were not in compliance with the Federal Aviation Regulations.
The agency says that Horizon had installed new external lighting systems on the aircraft without conducting radio frequency and electromagnetic interference tests before resuming operational flights.
These aircraft flew between Oct. 19, 2009 and Mar. 17, 2010 before the FAA discovered the compliance issue during routine surveillance.
Horizon has 30 days to respond to the FAA about the proposed penalty after receiving the notice.