Coyne Helicopter Incident

The Encounter

On the night of October 18, 1973, at approximately 11:05 PM, a Bell UH-1H Huey helicopter (Army Reserve designation 68-15444) was en route from Port Columbus to Cleveland Hopkins International Airport, cruising at 2,500 feet near Charles Mill Lake in Mansfield, Ohio. The four-person crew—Captain Lawrence J. Coyne (pilot), First Lieutenant Arrigo Jezzi (copilot), Sergeant Robert Yanacsek (crew chief), and Sergeant John Healey (flight medic)—had no expectation that they were about to encounter one of the most well-documented military UFO incidents in American history.

Sergeant Yanacsek first spotted a red light on the eastern horizon approaching at extraordinary speed—estimated at 600+ knots—on a collision course with the helicopter. Captain Coyne, a skeptic of UFO phenomena before the encounter, immediately initiated an emergency descent from 2,500 feet down to 1,700 feet to avoid impact. The object stopped directly above the helicopter, described by all witnesses as a 60-foot cigar-shaped craft with metallic gray hull, a domed top, and three distinct light sources: a steady red light at the nose, a powerful green beam emanating from the lower portion, and a white light at the tail.

The green beam was extraordinary—it bathed the entire interior and exterior of the helicopter cabin in an intense green glow. Witnesses on the ground in the Mansfield area also reported seeing the sky and surrounding vegetation turn green. The encounter lasted approximately 5 to 10 minutes before the object slowly continued westward and then accelerated at high speed, disappearing from view. The entire experience was documented in official military records and reported immediately to air traffic control.

Physical Effects and Anomalies

The most striking aspect of the Coyne incident is not merely the sighting itself but the documented physical effects on the aircraft and crew. As the encounter occurred, Sergeant Yanacsek noticed the helicopter was climbing despite Captain Coyne having the collective stick (which controls vertical lift) in the full down position—a configuration that should have caused descent, not ascent. The helicopter climbed approximately 1,800 feet, reaching 3,500 feet, at a steady rate of 100 feet per minute, with no pilot input or control inputs that could explain the phenomenon.

The helicopter's magnetic compass began rotating slowly during the encounter and was later found to be inoperative, requiring complete replacement. Both UHF and VHF radio frequencies simultaneously lost signal for approximately 10 minutes during and immediately after the encounter. The radio magnetic indicator, by contrast, continued to function normally throughout. These electromagnetic effects were consistent with exposure to a powerful electromagnetic field.

Mansfield Tower confirmed via radio that no conventional aircraft were operating in the area at the time of the encounter, and the helicopter itself later was detected on Cleveland radar at a position consistent with the crew's account. The physical evidence—a permanently damaged compass requiring replacement—provided tangible documentation of the incident.

Military Investigation and Credibility

The U.S. Army Reserve and FAA initiated an immediate investigation. All four crew members submitted sworn statements on military form DA FORM 2496, detailing their experience with consistent accounts. The military classified the incident as "unexplainable" in its final report—a remarkable conclusion for an official military investigation. Importantly, the military did not suppress the crew's account or prevent them from speaking publicly about their experience, a distinction that sets this case apart from many classified encounters.

The credibility of the witnesses was exceptional. Captain Coyne was an experienced pilot with 19 years of flying experience. First Lieutenant Jezzi held a degree in chemical engineering. The crew included a computer technician and a Cleveland police officer. All were trained military personnel with professional backgrounds and no financial incentive to fabricate a story. Coyne himself was initially skeptical of UFO phenomena, making his account more credible as an unwilling witness.

In 1973, the National Enquirer's investigative panel awarded the Coyne incident its $5,000 Blue Ribbon Panel Award for the "most scientifically valuable UFO report of 1973." The Center for UFO Studies, led by J. Allen Hynek, designated it the most credible UFO incident of that year. In 1978, Captain Coyne appeared before a United Nations committee convened by Grenada to discuss UAP phenomena, lending further international credibility to the case.

Explanations and Current Status

Skeptics have proposed conventional explanations. A misidentified aerial refueling operation with an HC-130P military tanker was suggested, though it fails to account for the documented compass malfunction or the unexplained altitude climb with full-down collective stick. Philip J. Klass, a prominent UFO skeptic, proposed Orionid meteor misidentification, but even Klass acknowledged this explanation strained credulity and attributed the altitude anomaly to pilot error—a conclusion the crew's training and recollection contradicted.

No satisfactory conventional explanation has ever been presented that adequately accounts for all documented aspects of the incident: the object's appearance, approach speed, green beam intensity, compass malfunction, simultaneous radio failure, and the unexplained vertical climb with the collective stick in full down position. The Coyne Helicopter Incident remains one of the most credible close-encounter cases in UFO history, documented by military witnesses, corroborated by ground observers, and acknowledged as unexplainable by official investigations.