Within Coyne Encounter
Why the Crew Reported a Strange Encounter
The four Army Reserve crew members described a close aerial encounter that became one of the best-known military UFO reports.
On this page
- The four person flight crew
- Descriptions of the object and flight events
- How witness credibility shaped the case
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Introduction
The crew testimony is the central reason the 1973 Coyne helicopter sighting remains one of the most discussed military UFO reports. Unlike many unidentified aerial phenomenon cases based on a single distant observation, the Mansfield, Ohio encounter involved four Army Reserve personnel aboard a UH-1H helicopter who independently described a close-range event during an active flight. Their accounts formed the core of an official military report, later investigations, and decades of debate over whether the event represented an unexplained aerial phenomenon, a misidentified object, or a combination of unusual perception and incomplete information.[Nicap]nicap.orgUFO ReportUFO ReportOctober 18, 1973…
The importance of the testimony lies less in proving what the object was and more in the unusual combination of witness factors: trained aviation personnel, multiple observers in different positions inside the aircraft, a formal report filed after the encounter, and partial agreement with observations from people on the ground. At the same time, the evidence remains primarily testimonial; no physical object or trace evidence has been made publicly available.[Nicap]nicap.orgUFO ReportUFO Report…
The four-person flight crew
The helicopter crew consisted of Captain Lawrence J. Coyne, First Lieutenant Arrigo Jezzi, Sergeant John Healey, and Specialist Robert Yanacsek. Coyne was the aircraft commander and an experienced Army helicopter pilot. Jezzi was flying from the left seat during the encounter, while Healey and Yanacsek were seated in the rear of the UH-1H. Their different positions gave them different viewing angles, which later became an important part of how investigators assessed the account.[Nicap]nicap.orgUFO ReportUFO Report…
Captain Coyne became the most publicly associated witness because he was responsible for the aircraft and later filed the formal report. Contemporary accounts describe him as someone who did not identify as a UFO enthusiast and who initially treated the approaching light as possible air traffic rather than as something extraordinary. His decision to report the event was based on his belief that the crew had experienced something unusual during flight, rather than on a prior interest in UFO claims.[Ufo Phenomenon]ufologie.patrickgross.orgUfo PhenomenonufoUFOS at close sight: the newspapers, the Coyne incident, Mansfield, Ohio, USA, 1973November 4, 1973…
First Lieutenant Jezzi’s testimony is significant because he was the pilot physically operating the helicopter at the time. He reported that he did not initially see the distant red light because of his position inside the aircraft, but became involved when the object appeared to approach the helicopter. His account supports one of the notable features of the case: not every crew member had exactly the same visual experience at every moment, but their observations overlapped during the closest part of the encounter.[The Living Moon]thelivingmoon.com1973 Lawrence Coyne UFO Helicopter CaseThe Living MoonCaptain Lawrence Coyne UFO Helicopter case 1973November 4, 1973…
Sergeant John Healey and Specialist Robert Yanacsek provided important observations from the rear of the helicopter. Yanacsek was reportedly the first crew member to focus on the red light that later became associated with the object. Healey also contributed descriptions of the object’s apparent shape and lighting. Investigators have often pointed to these separate viewing positions as a reason the case attracted attention, while critics note that shared conditions inside a small aircraft can also influence how witnesses interpret an unusual event.[Nicap]nicap.orgUFO ReportUFO ReportOctober 18, 1973…
What the crew described during the encounter
The crew’s account began with a distant red light that initially appeared to be ordinary aircraft traffic. According to the reports, Yanacsek observed the light and watched it before alerting the others. The light then appeared to move onto a path that suggested a possible collision with the helicopter. Coyne took control and initiated a descent to avoid the approaching object.[Nicap]nicap.orgUFO ReportUFO ReportOctober 18, 1973…
The most unusual part of the testimony concerned the object’s behaviour at close range. The crew described seeing a large grey, metallic-looking object with a cigar-like or elongated shape and a dome-like structure. They reported that it appeared to slow dramatically, move above the helicopter, and illuminate the aircraft with a green light. Sergeant Healey’s description, recorded in later case summaries, characterised the object as roughly 60 feet long with no obvious wings, engines, or conventional aircraft features visible.[Nicap]nicap.orgUFO ChronologyUFO Chronology…
Coyne’s account focused heavily on the helicopter’s unexpected climb. He reported that the aircraft continued upward even though he believed the controls were set for a descent. The official report and later summaries describe the crew’s perception that the helicopter rose from the lower altitude reached during the avoidance manoeuvre to a higher altitude before the object departed. Supporters of the case regard this as the strongest unexplained element, while sceptical analyses have questioned the interpretation of the flight instruments, pilot perception, and the circumstances of the manoeuvre.[Ufo Phenomenon]ufologie.patrickgross.orgUfo PhenomenonufoUFOs at close sight: The Coyne case, Mansfield, Ohio, 1973, the official report…
The crew also reported unusual effects involving their communications equipment. The case file states that radio contact problems occurred during the incident and later returned to normal. Researchers have treated this as an additional detail supporting the crew’s impression that something abnormal happened, although the relationship between the reported radio issues and the sighting has never been independently established.[Nicap]nicap.orgUFO ReportUFO ReportOctober 18, 1973…
How witness credibility shaped the case
The reputation of the witnesses is one of the main reasons the Coyne sighting became prominent among UFO investigators. Military aviation personnel are generally considered valuable witnesses because they are trained to observe aircraft, judge flight situations, and operate under demanding conditions. In this case, supporters argue that the crew’s experience makes a simple mistake less likely than it would be for an untrained observer.[Nicap]nicap.orgUFO ReportUFO Report…
However, witness credibility does not automatically determine the identity of an object. Aviation professionals can still misjudge distance, speed, size, and unusual lighting conditions, especially during a sudden nighttime encounter. The key question for investigators has therefore been not whether the crew were sincere, but how accurately their perceptions represented an external object’s characteristics and movements.[Cleveland Ufology Project]clevelandufo.comCleveland Ufology ProjectCoyne Helicopter Incident – 1973 | Cleveland Ufology Project…
The case gained additional attention because the crew’s descriptions were partly supported by people on the ground. Several ground witnesses reported seeing a helicopter and an unusual object or light in the same general area, including descriptions of an object resembling a blimp. These accounts did not independently establish the object’s nature, but they added another layer of corroboration to the timing and location of the event.[Nicap]nicap.orgUFO ReportUFO Report…
Agreement, differences, and the limits of the testimony
The strongest area of agreement among the crew was the basic sequence: an unusual light approached, the helicopter crew believed a collision was possible, a close encounter followed, a green illumination was observed, and the object departed. This shared timeline is one reason researchers have continued to treat the case as unusual.[Nicap]nicap.orgUFO ReportUFO ReportOctober 18, 1973…
The differences between individual accounts are equally important. The crew did not all see the object from the same angle or at the same moment. Their descriptions varied slightly in wording and emphasis, with some focusing on the shape, others on the lights, and others on the aircraft’s movement. Such variation can occur in genuine observations because witnesses notice different features, but it also means the testimony must be evaluated as a collection of human observations rather than as a single photographic record.[Ufo Phenomenon]ufologie.patrickgross.orgUfo PhenomenonufoUFOs at close sight: The Coyne case, Mansfield, Ohio, 1973, drawingsOctober 18, 1973…
Ultimately, the crew testimony established that four trained Army Reserve personnel reported a striking and confusing aerial encounter. It remains the foundation of the Coyne helicopter sighting because it provides the detailed human account behind the case. The unresolved issue is not whether the witnesses reported something unusual—they clearly did—but what physical event best explains their combined observations.[Nicap]nicap.orgUFO ReportUFO Report…
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Endnotes
1.
Source: nicap.org
Title: UFO Report
Link:https://www.nicap.org/731018mansfield_dir.htm
Source snippet
UFO ReportOctober 18, 1973...
Published: October 18, 1973
2.
Source: nicap.org
Title: UFO Report
Link:https://www.nicap.org/reports/731018mansfield_report.htm
Source snippet
UFO Report...
3.
Source: nicap.org
Title: UFO Chronology
Link:https://www.nicap.org/chronos/1973fullrep.htm
Source snippet
UFO Chronology...
4.
Source: nicap.org
Title: UF O Report
Link:https://www.nicap.org/casework/2014indexes/oct-dec/731018mtvernon_dir.htm
5.
Source: ufologie.patrickgross.org
Title: Ufo Phenomenonufo
Link:https://ufologie.patrickgross.org/htm/coynereport.htm
Source snippet
UFOs at close sight: The Coyne case, Mansfield, Ohio, 1973, the official report...
6.
Source: ufologie.patrickgross.org
Title: Ufo Phenomenonufo
Link:https://ufologie.patrickgross.org/htm/coyne.htm
Source snippet
UFOs at close sight: The Coyne case, Mansfield, Ohio, 1973...
7.
Source: ufologie.patrickgross.org
Title: Ufo Phenomenonufo
Link:https://ufologie.patrickgross.org/press/mansfieldnewsjournal4nov1973.htm
Source snippet
UFOS at close sight: the newspapers, the Coyne incident, Mansfield, Ohio, USA, 1973November 4, 1973...
Published: November 4, 1973
8.
Source: thelivingmoon.com
Title: 1973 Lawrence Coyne UFO Helicopter Case
Link:https://www.thelivingmoon.com/49ufo_files/03files2/1973_Lawrence_Coyne_UFO_Helicopter_Case.html
Source snippet
The Living MoonCaptain Lawrence Coyne UFO Helicopter case 1973November 4, 1973...
Published: November 4, 1973
9.
Source: clevelandufo.com
Link:https://clevelandufo.com/?page_id=18
Source snippet
Cleveland Ufology ProjectCoyne Helicopter Incident – 1973 | Cleveland Ufology Project...
10.
Source: ufologie.patrickgross.org
Title: Ufo Phenomenonufo
Link:https://ufologie.patrickgross.org/htm/coynedrawings.htm
Source snippet
UFOs at close sight: The Coyne case, Mansfield, Ohio, 1973, drawingsOctober 18, 1973...
Published: October 18, 1973
12.
Source: curiositiescat.com
Link:https://curiositiescat.com/witnesses/fca9ac0bd40f0b04
Additional References
13.
Source: youtube.com
Link:https://www.youtube.com/watch?v=6cgeAklr2VM
Source snippet
UFO lifted military helicopter 2000ft. Lt. Col. Lawrence Coyne compilation...
Published: October 18, 1973
14.
Source: disclosurevault.org
Title: The Disclosure Vault
Link:https://www.disclosurevault.org/docs/582185f2-aecd-42e4-a5ec-fe85e46e6abd
Source snippet
June 12, 2026 — T1 · RELEASE · Brazilian National Archive (FAB) - UAP Records A HELICOPTER-UFO ENCOUNTER OVER OHIO [Translated from Portu...
Published: June 12, 2026
15.
Source: youtube.com
Title: Helicopter UFO Encounter
Link:https://www.youtube.com/watch?v=nea6XuD1Vfc
Source snippet
Unsolved Mysteries - The Coyne "UFO" Incident 1973...
16.
Source: youtube.com
Title: Unsolved Mysteries
Link:https://www.youtube.com/watch?v=VAsidKKTtNs
Source snippet
Coyne helicopter UFO 1973 Coyne UH-1H Helicopter UFO Incident 1973 Benzemas1...
17.
Source: youtube.com
Link:https://www.youtube.com/watch?v=dllcDPLQfK8
Source snippet
Helicopter UFO Encounter - The Coyne Incident or The Mansfield Encounter 1973...
18.
Source: medium.com
Link:https://medium.com/%40/army-helicopter-makes-contact-with-an-alien-craft-over-ohio-87cbc7e35ab4
19.
Source: journalnews.com.ph
Link:https://journalnews.com.ph/ufo-encounters-involving-military-pilots-that-are-very-hard-to-dismiss-as-mistakes/
20.
Source: tvi.show
Title: the coyne helicopter incident military meets the unknown in a 1973 ufo encounter
Link:https://www.tvi.show/close-encounters/the-coyne-helicopter-incident-military-meets-the-unknown-in-a-1973-ufo-encounter
21.
Source: youtube.com
Link:https://www.youtube.com/watch?v=uKVVGOMvCic
Source snippet
Lt Coyne UFO case 1973 Mansfield Ohio...
22.
Source: medium.com
Title: Helicopter And Alien Craft Encounter Over Ohio | by Johnmooner-chief | Medium
Link:https://medium.com/%40johnmooner-chief/helicopter-and-alien-craft-encounter-over-ohio-d27da6263cc8