The Manhattan flight instructor killed in Saturday’s plane crash in Westchester was an expert pilot who gave lectures on emergency landings after making his own Sully Sullenberger-like miracle touchdown on Martha’s Vineyard 15 years ago.

“He was an amazing, brilliant pilot. He could get out of anything,” William Weiner said of his son Keith, 63, who died with wife Lisa, 51, their 14-year-old daughter, Isabel, and a friend, also 14, in the small-plane crash.

“It must’ve been a mechanical failure, because my son wouldn’t have failed,” the 85-year-old father said.

The Cessna 210 had been carrying the Weiner family, who lived on West 57th Street, and Isabel’s friend Lucy Walsh when it crashed and burst into flames at 1:06 p.m. shortly after takeoff from Westchester County Airport for a luncheon trip to Montauk, LI.

The plane’s wreckage was found in a wooded area in Armonk, about two miles from the airport, with the three-blade propeller and engine still intact.

“The cause can’t be answered as of yet,” said Ralph Hicks of the National Transportation Safety Board. “We do know that the entire cockpit was engulfed in flames, and there was no black box.”

William Weiner, a retired pilot himself, said his son would purposely kill his engines at high altitudes to practice handling emergencies.

That practice saved his and his wife’s lives 15 years ago on a flight from Nantucket to Martha’s Vineyard when his engines died and he couldn’t restart them.

Keith glided to a miraculous pinpoint landing smack on the runway at the Martha’s Vineyard airport, his proud pop said.

The feat — reminiscent of Capt. Chesley “Sully” Sullenberger’s “Miracle on the Hudson” landing in 2009 — astounded airport personnel and led to many invitations to speak to pilots about emergency landings.

Of Saturday’s crash, William Weiner said that his son had wanted to make the family flight on Saturday so he could spend Father’s Day with him.

“He was more than a son. He was my best friend,” the dad said.

“He called me every morning to make sure I was OK.”

Neighbors described the family as loving, talented and generous.

Keith offered weekend flying trips to the Hamptons — even to the doorman, they said.

Lisa loved whipping up gourmet treats and sharing them, and Isabel was a gifted student and aspiring ballerina, they added.