The extraordinary reading
The green illumination and unexpected altitude gain happened close together in the crew narrative. Later retellings therefore describe the helicopter as being physically “lifted” by the object.
NEAR MANSFIELD, OHIO · 18 OCTOBER 1973
Collision course.
Then the helicopter climbed.
Four Army Reserve crewmen said a red light rushed toward their UH-1H on a near-collision course. Coyne pushed the helicopter into descent. The official Army report says the crew later found itself climbing through 3,500 feet with the collective still down.
18 OCT 1973Near Mansfield, Ohio.
UH-1H 68-15444Army Reserve helicopter named in the report.
4 CREWMENAll signed the Army disposition form.
2,500 → 1,700 → 3,500 FTReported altitude sequence.
THE REAL CASE
This one begins with a signed Army report.
On the night of 18 October 1973, Army Reserve helicopter 68-15444 was returning from Columbus to Cleveland on a routine proficiency flight.
On board were Captain Lawrence J. Coyne, pilot in command; First Lieutenant Arrigo Jezzi, copilot; Staff Sergeant Robert Yanacsek, crew chief; and Staff Sergeant John Healey, flight medic.
The surviving Army disposition form places the helicopter southeast of Mansfield Airport at about 11:05 p.m., flying at roughly 2,500 feet on a heading of 030 degrees.
The report is unusually valuable because all four crewmen attested to it. But the famous later story contains details that do not all appear in that one document.
THE APPROACH
A red light became a collision threat.
RED LIGHTYanacsek reported a red light on the eastern horizon, roughly perpendicular to the helicopter's flight path.
CONVERGENCEThe crew judged the light to be closing rapidly at approximately their altitude.
DESCENTCoyne took control and pushed the helicopter down from about 2,500 toward 1,700 feet.
PASSThe crew expected impact; instead the object was reported to hesitate over or near the helicopter and continue westward.
THE OBJECT
The Army form says “unidentified flying object.” The shape comes from testimony.
The signed disposition form centres on a rapidly converging red light and the helicopter's evasive response.
In early press accounts and later interviews, Coyne and other crewmen described something more structured: elongated or cigar-shaped, grey or metallic, with a dome-like upper feature and coloured lights.
A green illumination shining into or around the helicopter became one of the case's defining details.
Those descriptions belong to the witness record — but they should not be silently back-filled into every line of the official Army form.
THE CLIMB
The strangest line is in the official report.
Coyne had initiated a powered descent to avoid what he believed was an impending collision.
The Army report states that the helicopter descended to about 1,700 feet.
After the close encounter, Coyne reported seeing the altimeter at roughly 3,500 feet with a climb indication while the collective remained in the full-down position.
That creates the central physical mystery of the case.
What the record does not contain is a synchronized flight-data trace showing control position, rotor state, vertical speed, altitude and power throughout the event.
DID THE OBJECT LIFT THE HELICOPTER?
That interpretation goes beyond the instrument record we have.
The evidential limit
The official form records the altitude sequence and collective position, but it does not establish a mechanism. Aerodynamic response, control input, perception under stress and instrument behaviour all require testing.
An unexplained climb indication is evidence. “The UFO lifted the helicopter” is an interpretation.
THE RADIO
Mansfield Tower answered once.
The Army report states that Coyne contacted Mansfield Tower and received an initial acknowledgement.
He asked whether any high-performance aircraft were operating nearby, but no further response was received.
Later testimony broadened this into radio failure on both UHF and VHF during part of the encounter.
Again, that distinction matters because the surviving form does not provide a technical communications log that can tell us whether there was interference, reception loss or another radio issue.
THE GROUND WITNESSES
Potential corroboration — found years later.
A family in the Mansfield area was later interviewed and described seeing a helicopter with unusual red and green lights or an accompanying luminous object.
That sounds powerful because it may independently place unusual light activity near the helicopter.
But the evidential chain is weaker than the crew's: the family was located only after a newspaper appeal several years after the event, and no contemporaneous 1973 statement or call log from them is known publicly.
Ground corroboration should therefore be included, but not given the same weight as the four-man Army report.
THE METEOR HYPOTHESIS
Could a bright fireball start the whole sequence?
A meteor or bright fireball can appear suddenly, change apparent brightness, seem to move rapidly toward an observer and create a powerful impression of collision.
That makes it a serious candidate for the initial red-light approach.
But a meteor explanation has to match the exact time, direction and duration of the Coyne observation. It also has to account for why the crew later described a structured object and prolonged close interaction.
The meteor hypothesis may explain the trigger without automatically explaining every later detail.
WHAT HOLDS UP
The strongest facts are surprisingly durable.
Four named crewmen
Coyne, Jezzi, Yanacsek and Healey are named in the Army report.
Signed military report
The crew attested to a formal near-midair UFO report.
Evasive descent
The disposition form records Coyne descending to avoid the perceived collision threat.
Later climb indication
The report itself includes the 3,500-foot altitude / climb statement with collective down.
Ground family
Potential corroboration exists, but was recovered years after the event.
Instrument record
No flight recorder, radar plot, tower tape or event photograph has been recovered publicly.
WHAT REMAINS
Four aircrew agreed something forced an emergency response.
The Coyne case does not depend on one frightened pilot telling a story decades later. It begins with four Army Reserve crewmen and a formal report.
What remains uncertain is the mechanism behind what happened next.
Was the initial light a meteor or aircraft? Did stress and helicopter dynamics create the apparent climb? Did a genuinely unknown object pass close enough to illuminate the cabin?
Coyne is strongest where the paperwork and testimony overlap — and weakest where later retellings fill gaps the instruments never recorded.
VIEW THE COYNE DOCUMENT / INVESTIGATION ARCHIVE ↗SOURCE ROOM
Start with the signed report. Then add the testimony.
U.S. Army DA Form 2496 transcriptionOFFICIAL REPORT TEXT · 23 NOVEMBER 1973 · FOUR CREW SIGNATURES
NICAP / Jennie Zeidman case archiveCREW TESTIMONY · INVESTIGATION · DOCUMENT CHAIN · GROUND-WITNESS MATERIAL
Mansfield News Journal / UPI · 4 November 1973NEAR-CONTEMPORARY PRESS ACCOUNT · COYNE DESCRIPTION
Existing UAP Map case recordSTRUCTURED CASE SYNTHESIS · SOURCE-LAYER REVIEW
Bell UH-1H Huey contextual imagePUBLIC DOMAIN · AIRCRAFT-TYPE CONTEXT · NOT INCIDENT AIRFRAME
Highest-value missing evidenceFLIGHT/INSTRUMENT RECORD · MANSFIELD TOWER TAPE · RADAR DATA · 1973 GROUND-WITNESS RECORD · FIREBALL-TIMING CORRELATION