An NYPD community-affairs officer who was stripped of his gun and badge tried to retire Monday — triggering his immediate suspension because he is still a target of a federal corruption probe.

Detective Michael Milici, a 20-plus-year veteran currently assigned to the 66th Precinct in Borough Park, Brooklyn, was placed on modified duty earlier this month after invoking his Fifth Amendment rights before a grand jury hearing evidence in the case.

Milici was being questioned about his relationship with two businessmen suspected of offering cash and gifts to police brass in exchange for favors, such as free NYPD security at special events and rides to and from the airport.

The Post reported exclusively that Milici and other police officials took at least one trip on a private plane with the men in 2014, and that at least some on board allegedly had sex with a hooker dressed as a flight attendant.

So far, nine mostly high-ranking officers have been transferred or had their jobs modified as a result of the federal investigation.

Police sources said Milici filed his retirement papers on Monday morning.

The Internal Affairs Bureau was notified and he was then suspended without pay. He will still receive his pension because he has more than 20 years on the job, sources said.

“This is obviously a complicated situation that I prefer not to discuss in the media other than to say that Detective Milici, having an unblemished record for 25 years, simply invoked his constitutional right and he has not been officially accused of anything,” said Michael Palladino, head of the Detectives Endowment Association.

Milici’s lawyer, Patrick Parrotta, previously told The Post that any benefits the businessmen might have received from the cops would have come at the behest of department brass and/or Mayor de Blasio.