The U.S. Army Reserve Helicopter Crew UFO Encounter, near Mansfield, Ohio, 18 October 1973, 11:05 p.m.
The U.S. Army Reserve UH-1H (Huey) helicopter crew of four who witnessed this UFO encounter was returning back to its base in Cleveland, Ohio from Columbus, Ohio on this night.
The crew members included Captain Lawrence J. Coyne (pilot), First Lieutenant Arrigo Jezzi, Sergeant John Healey and Sergeant Robert Yanacsek.
“UFOs are Real” (1979) (UFO documentary):
The Army Reserve crew UFO encounter segment of the documentary can be found 40 seconds into the video:
(Source: ProphecyGuru (YouTube channel))
NICAP.org UFO case directory (EMCAT):
“Coyne Helicopter, E-M / Magnetic Compass Encounter”:
Lieutenant Colonel Lawrence J. Coyne,
U.S. Army (youtube.com image)