Quick Info
On the evening of October 21, 1978, 20-year-old Australian pilot Frederick Valentich took off from Moorabbin Airport near Melbourne in a rented Cessna 182L for a short night flight to King Island across Bass Strait. He never arrived. During his final radio conversation with Melbourne air traffic control, he reported an unidentified aircraft hovering above him, with four bright lights and a shiny metallic surface.
He said it was orbiting him, his engine was running rough, and finally: "It's hovering and it's not an aircraft." That was followed by 17 seconds of strange metallic scraping sounds, then silence. Neither Valentich nor his plane was ever found, despite a massive search. The official investigation could not determine the cause and listed it as presumed fatal.
The case remains one of aviation's most haunting unsolved mysteries, with endless speculation about UFOs, pilot error, suicide, or something deliberate.
Timeline of Events – October 21, 1978
Reconstructed from the official Department of Transport transcript, witness statements, search records, and later reports.
- 6:19 p.m. AEST Frederick Valentich departs Moorabbin Airport in Cessna 182L VH-DSJ for King Island (125 nautical miles over Bass Strait). Weather clear, good visibility, light winds. Valentich had 150+ hours flying time, including night hours, but was still relatively inexperienced.
- 7:06 p.m. Valentich makes first contact with Melbourne Flight Service (controller Steve Robey). Reports he is at 4,500 feet, asks if any known traffic below 5,000 feet. Robey says no known traffic.
- 7:06:14 p.m. Valentich: "Seems to be a large aircraft below five thousand." He describes it passing over him at least 1,000 feet above, four bright lights (like landing lights).
- 7:08 p.m. Valentich reports the aircraft is now orbiting above him. "It has a green light and sort of metallic. It's all shiny on the outside." He says it's not an aircraft.
- 7:09–7:12 p.m. Valentich's voice becomes more urgent. He describes the object as having four bright lights, moving at high speed, hovering, orbiting him. Engine roughness starts. "It's not an aircraft... it's hovering on top of me again." He is orbiting to keep it in sight.
- 7:12:09 p.m. Final words: "It is hovering and it's not an aircraft." Followed by 17 seconds of unidentified metallic scraping/clicking noises (described as "like a tape being rewound"). Then silence. No further contact.
- Immediately after Valentich vanishes from radar. No distress call, no Mayday. Plane does not arrive at King Island. Search launched that night: air, sea, 1,000+ square miles. No wreckage, debris, oil slick, or body ever found.
- October 22–25, 1978 Massive search (RAAF, Navy, civilian aircraft, boats). Nothing. Valentich presumed dead. Case becomes national news, especially after transcript released.
- 1982–1983 Department of Transport report: cause undetermined, presumed fatal. 1983: Cessna 182 cowl flap found on King Island (serial numbers matched partially, but could have drifted or been unrelated).
- 2012 Declassified 1978 report reveals search aircraft spotted but lost a debris field in Bass Strait, never relocated.
The Investigation and Official Findings
The Australian Department of Transport investigated for weeks. No wreckage, no oil slick, no body. Valentich was declared presumed dead. The 1982 report: "The reason for the disappearance of the aircraft has not been determined." No evidence of foul play or mechanical failure. The 17-second noise was never explained (some say radio interference or engine sounds). A 2012 declassified report revealed search aircraft spotted but lost a debris field, never found.
A Cessna 182 cowl flap washed up on King Island in 1983 (serial numbers partially matched, but could be coincidental or drifted). No suicide note or motive. Valentich had a girlfriend, job, no known mental health issues.
The Full Radio Transcript (Reconstructed)
Here is the key part of the conversation between Valentich (Delta Sierra Juliet) and controller Steve Robey (Melbourne Flight Service), starting around 7:06 p.m. (slightly abridged from official transcript; punctuation added for readability).
Valentich: Melbourne, this is Delta Sierra Juliet. Is there any known traffic below five thousand?
Robey: Delta Sierra Juliet, no known traffic.
Valentich: Delta Sierra Juliet, it seems to be a large aircraft below five thousand.
...
Valentich: It's got a green light and sort of metallic. It's all shiny on the outside.
...
Valentich: It's just vanished.
...
Valentich: Now it's coming for me from due south... It's orbiting on top of me also. It has a green light and sort of metallic.
...
Valentich: What I'm doing right now is orbiting and the thing is just orbiting on top of me also... It's got a green light... It's all shiny on the outside.
...
Valentich: It's not an aircraft.
...
Valentich: It's hovering and it's not an aircraft.
[17 seconds of metallic scraping/clicking noises]
[Silence]
The worrying thing, for me anyways, is that the 17 seconds of metallic scraping/clicking noises. If it was a simple small plane crash it seems bizarre it would last 17 seconds, no?
Theories and Debates
UFO abduction: Valentich's description (metallic, green lights, hovering, orbiting) matches classic UFO reports. No wreckage supports "taken" theory. Many UFO researchers see it as one of the strongest pilot-UFO cases.
Pilot disorientation/spatial disorientation: Valentich may have become confused over dark water (no horizon), mistook his own lights/reflections or Venus/planet for UFO, entered a descending spiral, crashed into sea. Engine roughness could be real or imagined under stress.
Suicide or deliberate act: Some speculate he wanted to disappear (insurance, personal issues), but no evidence. No note, no motive known.
Hoax/gone to start new life: Unlikely as plane never found, no sightings after.
Other: Mechanical failure (engine quit, ditched), collision with unknown object, or even secret military test. No radar confirmation of UFO (Melbourne radar showed only Valentich's plane).
Great video on this event from Bearing Unknown
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Legacy in 2026
Almost 50 years later, the Valentich disappearance is still Australia's most famous aviation mystery and one of the most chilling pilot-UFO cases ever. The transcript is iconic, his calm voice turning urgent, the metallic noise, then nothing. Featured in documentaries, books, Unsolved Mysteries, podcasts, and TV shows. In 2026, with renewed UAP hearings and government interest in aviation anomalies, people still debate: abduction? Suicide? Simple crash? The Bass Strait swallowed him and his Cessna without a trace, leaving only his words and that eerie 17-second sound.
