The helicopter company involved in a sightseeing tour that killed all five passengers on board is offering deep discounts for similar, “doors-off” flights amid a pending probe of the practice, US Sen. Charles Schumer said Sunday.

FlyNYON’s Web site touts 40 percent savings on its 16- and 30-minute chopper tours – with photos of passengers dangling their legs over Central Park and the water surrounding the Statue of Liberty.

There’s no mention, however, of the March 11, 2018, crash of a FlyNYON flight into the East River, in which the pilot escaped and was rescued – but the passengers were trapped inside by their safety harnesses.

“As you know, we had some terrible tragedies with door-open helicopter flights back in 2018,” Schumer said.

“And now, the airlines, particularly FlyNYON, which is one of New York’s airlines, is offering a deep summer discount. Forty percent discount for doors off-flights. We still don’t know what went wrong with that East River chopper crash.”

Schumer also called it “very good news” that the federal Department of Transportation’s inspector general “has agreed to do an investigation into door-off flights to see how dangerous they are.”

“We’ll await their results and hope they are as quick as possible,” Schumer said during a news conference at his Midtown Manhattan headquarters.

The Federal Aviation Administration temporarily banned doors-off flights in the wake of the 2018 crash, but allowed them to resume on the condition that passengers wear FAA-approved restraints that can be released quickly in event of an emergency.

FlyNYON’s Web site says the company received FAA approval for its new, 338-ARS Heli-Ops harness system on June 16, 2018.

“We appreciate and stand ready to support smart actions that allow for enhanced helicopter safety in the Greater New York City area. We stand ready to work with anyone who wants to pass common sense rules that create more jobs and ensure safety,” a company spokesman said.

In September, a lawyer for Airbus Helicopters – which built the AS350B2 chopper that crashed in the East River – responded to a lawsuit filed by the parents of victim Trevor Cadigan by blaming him for his own death.

Court papers said Cadigan “voluntarily undertook and assumed the known risk of being a passenger in a ‘doors off’ flight while knowingly being restrained by a harness from which he could not easily release himself.”

The suit, which also targets FlyNYON, pilot Richard Vance and Liberty Helicopters, which owned and operated the doomed whirlybird, remains pending in Manhattan Supreme Court.