They were questioned at the Lodhi Colony police station.
"The pilots have been called in for questioning on the basis of a complaint by the DGCA. They have been called in for an inquiry," a senior police official said.
The pilots were in the capital after they were directed by the DGCA to appear before it today, after its Joint Director General took offence at not being addressed with the correct designation in a letter written by them to him.
There was no immediate comment from Jet Airways and the DGCA.