Yuval Gonczarowski isn’t keen on flying, so when his flight finally touched down at Logan International Airport on Christmas night, his wife turned to him and began to say “Look, it’s OK. We landed.’’

But everything wasn’t OK.

Soon after they landed, the plane began slowing down — and the aircraft started fishtailing.

“We started spinning,’’ Gonczarowski said. “It was hard to tell where we were, because it was pitch black.’’

When the plane finally stopped, passengers began clapping out of sheer relief that nothing worse had occurred. Gonczarowski said his 4-month-old son slept through the whole thing, and only woke up when he heard the applause.

Gonczarowski and the other passengers were then instructed to stay buckled in their seats until they could be safely escorted off the plane.

Federal aviation officials are now looking into what caused the JetBlue plane to veer off the taxiway.

Jim Peters, a spokesman for the Federal Aviation Administration, said JetBlue Airways Flight 50 slid off the taxiway after landing safely at Logan around 7:10 p.m. It happened as the Airbus A320 was moving toward the gate area, he said.

Peters said passengers used stairs to exit the aircraft and were taken by bus to the terminal. The FAA investigation will “focus on what happened,’’ Peters said in an e-mail. There is “no deadline to completing the investigation,’’ he added.

The flight had arrived safely at Logan after traveling from Savannah, Ga., and the plane was making its way to the gate when it “somehow drove into the grass,’’ Massport spokeswoman Jennifer Mehigan said in an e-mail. Taxiways are the “roads’’ that planes use to roll to and from runways.

Mehigan said there were no injuries reported. “It was very minor,’’ she said.

Earlier in the day, Logan had temporarily stopped flights from coming or going because of inclement weather.

Gonczarowski, who lives in Cambridge, said in a telephone interview that his flight originally was supposed to depart Georgia at 2:55 p.m. and didn’t take off until around 5:15 p.m. due to the weather conditions at Logan.

Gonczarowski said he and his family were shaken up by the incident, but he also praised the captain and flight crew for how they handled the situation.

“Overall it was not a pleasant thing,’’ said Gonczarowski. “The crew did a fantastic job.’’

Emily Sweeney can be reached at esweeney@globe.com. Follow her on Twitter @emilysweeney. Aimee Ortiz can be reached at aimee.ortiz@globe.com. Follow her on Twitter @aimee_ortiz.