Question: I am a private pilot who spends a lot of time hanging out at the airport. Lately there has been discussion about the responsibility of a CFI during a noninstructional flight.
The CFI agreed to fly with a private pilot in the customer’s airplane after hours and off the clock for fun. They flew to a nontowered, slightly mountainous airport for kicks. It was a hot day, and the resulting density altitude situation combined with the short runway put them off the edge of the pavement into mud.