PenFed blimp, deflated, bursts into flames and crashes near U.S. Open at Erin Hills

Show Caption Hide Caption Video: Blimp crashes near U.S. Open at Erin Hills A PenFed blimp deflated, burst into flames and crashed late Thursday morning near the U.S. Open at Erin Hills.

TOWN of ERIN - Some of the biggest drama at the U.S. Open took place in the sky just east of the course Thursday morning when a blimp advertising for PenFed Credit Union deflated, burst into flames and crashed.

The blimp went down about 11:15 a.m. near Highways 83 and 167. The crash site was about a mile from the Erin Hills golf course where thousands of people gathered for the first morning of competition.

The pilot was flown by Flight for Life around noon to be treated for serious injuries, including burns, at Froedtert Hospital. The hospital identified him as Trevor Thompson and said he was in serious condition.

Thompson was coherent and stable enough to talk to officers, officials from the National Transportation Safety Board said at a news conference Thursday night. The NTSB is investigating the crash.

Officers reported that the aircraft had reached an altitude of about 1,000 feet before Thompson decided to land because of high winds. As he was descending, he heard panels rip off the air balloon and blimp hybrid that he was flying. He then turned the engines off, but residual fuel in the engines is what led to the fiery explosion that followed once the aircraft hit the ground.

Thompson was the only occupant of the aircraft, and no one on the ground was injured.

The blimp was operated by AirSign, an aerial advertising firm with operations across the country. The company website says it specializes in banner, blimps and sky writing.

FULL COVERAGE: 2017 U.S. Open at Erin Hills

"He stayed with the blimp until it went down," a spokesman for AirSign said in a telephone interview from Florida. He said that a crew member on the ground pulled Thompson from the wreckage.

Fox 6 reported that Thompson had made forced landings in 2015 and 2016.

The aircraft, a Gefa-Flug Airship, was manufactured in 2004, registered in Great Britain and owned by Airsign Ltd. of Williston, Fla.

The Federal Aviation Administration had no record of the blimp being involved in any accidents before Thursday, according to Lynn Lunsford, a public affairs manager for the agency.

The company tweeted: "Thanks to everyone for your concerns, the blimp pilot is being taken to the hospital but is expected to be OK. No details on cause of crash."

Thanks to everyone for your concerns, the blimp pilot is being taken to the hospital but is expected to be ok. No details on cause of crash — AirSign (@AirSign) June 15, 2017

"It started deflating, and then it started going down," said Bryan Rosine, who noticed the blimp while he was taking a tree down.

"They were trying to give it some throttle and it didn't go up. Then there was a bunch of kabooms and smoke clouds."

Another witness, Tim Guetzke and his 16-year-old son Hunter, an incoming junior at Hartford Union High School, were in the area and watching the blimp.

"The side started deflating," Tim Guetzke said. "One side was going in. As it headed toward the ground, it caught fire."

"It was doing fine for hours," he said. "Hunter could see it. He said, 'Dad, it's deflating. I think it's starting on fire.' When you realize someone is in there it makes you sad."

Golfer Jamie Lovemark said he saw the blimp while on the 5th hole.

"I was teeing off and I looked up and saw it on fire and I felt sick to my stomach," he said. "I had the shakes. I felt terrible for the people inside. I didn't know what was going on. It was a horrible sight."

The blimp landed in a farmer's field near a stand of trees and looked like a large deflated balloon. Videos show flames and explosions after the wreckage hit the ground.

The sign on the blimp advertised PenFed Credit Union, also known as the Pentagon Federal Credit Union. The nation's third-largest credit union with assets of about $22 billion, PenFed serves about 1.5 million people with connections to the military and has branches in 10 states.

Earlier Thursday morning, AirSign tweeted about the blimp's arrival and encouraged visitors to share photos.

The blimp took off from a small privately operated air field not far from the crash site, said Dan Coffey, owner of the Air Strip WN75.

"They were going to use it all week," Coffey said. "He was flying it for hours. I don't know if the wind caught up with him or what."

Coffey said that the accident was extremely unusual.

"These airships are FAA approved. They make sure that every one is inspected," he said. "This is an extremely rare accident."

Terry Williams, a spokesman for the National Transportation Safety Board, said the agency has launched an investigation into the incident and has dispatched an investigator to the scene.

A blimp unaffiliated with the #USOpen or @FOXSports has crashed near Erin Hills. Pilot was injured and first responders are on the scene. — U.S. Open (USGA) (@usopengolf) June 15, 2017

A statement distributed by the United States Golf Association said the blimp was not affiliated with the USGA or the U.S. Open.

"Our thoughts and prayers are with the pilot at this time," the USGA statement said.

Earlier Thursday morning, AirSign tweeted a picture: "The beautiful @penfed blimp is flying high over the US Open today!"

The company also tweeted a picture of the golf course taken from the blimp.

A manned blimp unaffiliated with FOX Sports or the #USOpen crashed near the course today. We will provide more details as they're available. pic.twitter.com/QEAk8tiU0K — FOX Sports (@FOXSports) June 15, 2017

Pretty sure I just watched the blimp crash at the #USOPEN! Hope everybody is ok! pic.twitter.com/OSOCSBF46p — Adam Johnson (@Coach_Guy_AJ) June 15, 2017

The blimp crash was far from the course but the smoke that rose above the trees afterwards was terrifying. — Mike Hall (@BTNMikeHall) June 15, 2017

#USOpen A blimp has caught fire flying over the @usopengolf and crashed in the woods near @ErinHillsGolf . pic.twitter.com/OlhebVlNky — Mr. Terrific ™ (@RealMrTerrific) June 15, 2017

Just got to the #USOpen and the blimp caught fire and crashed. People parachuted out. pic.twitter.com/1lDi3VkXCu — madison seigworth (@msiggyy) June 15, 2017

Joe Taschler, Kevin Crowe and Jordyn Noennig of the Journal Sentinel staff contributed to this report.