What happened with this flight?

Regularly scheduled flight from Phila to Roa. Looks like it took off and returned to the airport in this link:

flightaware.com/live/flight/PDT4 … /KPHL/KROA

When you look at the details of the flight, it appears to have climbed to an altitude of 18,000 and then immediately began descending to 5,000 feet at speeds of nearly 400 mph??? In a Dash8-300??? Is this accurate and if so, what would have caused a flight pattern like this?

flightaware.com/live/flight/PDT4 … L/tracklog

Would that have been an “uncomfortable” flight for passengers if that data is accurate??

are you talking about the flight on Jan 23rd?

It looks like it got to cruise and then decided to turn around. The speed looks OK to me…