Local pilots in the air and a passing motorist played an important role in the response to a small twin-engine aircraft that crashed in Larkspur on Sunday.

Flight tracking platform Webtrak  shows the aircraft departed Centennial Airport, to the south, at approximately 07:35 a.m., flying along Perry Park Road almost to the Renaissance Festival grounds.

The aircraft then headed north toward Dawson Ridge Boulevard where it again turned to the south following Interstate 25.

Radio transmissions from Centennial Airport’s air traffic control tower indicate controllers were unable to communicate with the aircraft and have asked other pilots in the vicinity to assist with locating it.

“Twin tech nine-eight-golf-victor got you squawking at 7700,” the controller said to the pilot, referring to a universal aircraft transponder code used for aircraft emergencies.

A few minutes later, the controller asks another aircraft in the vicinity for assistance in locating the aircraft.

“There’s an emergency aircraft at your 11 o’clock and…uh 6 miles.,” the controller said, “Twin Technam. Over the interstate, there. If you wouldn’t mind, just flying down that direction. It’s over Castle Rock…”

The aircraft came to rest in a field near I-25, around the Larkspur exit at mile-marker 173 around 7:50 a.m.

First responders and rescue crews from the Larkspur Fire Department were notified of the incident and responded to the scene where Larkspur Fire Chief Timothy McCawley said his crew of six arrived to find the aircraft upside down in the water near an embankment.

He said the two passengers were assisted out of the aircraft by a passing motorist who saw the incident and stopped to help and were sitting next to the aircraft when they arrived.

McCawley said responders had to wade through waist-deep water to reach the aircraft where the passenger and pilot were then turned over to medical personnel and transported to a local medical facility for treatment.

Prior to the crash, cell phone video from motorists on I-25 showed the aircraft coming in low and striking a solid object.

The Federal Aviation Administration aircraft registry database shows the 2018 Technam P2006T  registered to Marsh Equipment, LLC in Aurora, Oregon.

The incident occurred under unknown circumstances, according to an FAA website.

Ian Gregor from the FAA Office of Communications said both the FAA and NTSB will investigate.

Almost two years ago, as reported by KDVR-TV in Denver, another aircraft registered to Marsh Equipment, LLC, made an emergency landing on the Fox Hollow Golf Course in Lakewood.

It was the second small place crash near the metro Denver area in the past two weeks. On June 7, a small planed burst into flames after making an emergency landing on a street in Arvada. One Parker woman died in the crash, and three others were injured.

They departed Centennial Airport at approximately 9:16 a.m. on June 7 aboard a 1969 Beechcraft V35A Bonanza and were “presumably en route to the Rocky Mountain Metropolitan Airport (BJC) for unknown reasons,” National Transportation Safety Board spokesman Alex Lemishko said.