Remains of an F-5 fighter that disappeared 40 years ago are found in Lagoa dos Patos (RS)

F-5 FAB 4831 Missing Mystery Lagoa dos Patos RS Lieutenant Chiapetta

The mysterious disappearance of an F-5E Tiger II fighter from the Brazilian Air Force (FAB) may finally have come to an end, 40 years after its disappearance. A fisherman and a sailor found parts of the supersonic jet that disappeared in Lagoa dos Patos in 1982. 

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The accident, recounted in other matter of this portal, completed four decades this year. On July 28, 1982, a pair of F-5 fighters from the Pampa Squadron (1st/14th GAv, Canoas Air Base unit) took off for a dogfight mission, an operation that had always been part of the unit's routine. The aircraft flew to one of the training areas over Lagoa dos Patos and began combat. 

F-5E fighter jets flying over Lagoa dos Patos.

In one of the F-5s, registration FAB 4831, was Lieutenant Aviator Edson Luiz Chiapetta Macedo. That would be his last flight. At some point during training, Lieutenant Edson suffered spatial disorientation and dived with the fighter into the Lagoon. The other F-5 returned to Canoas and the FAB began the search immediately. For two weeks, the Air Force, the Police and the Fire Department searched for the F-5, finding only small pieces. 

The mystery was perpetuated, with the population creating theories and assumptions about the accident, some that mention desertion and even extraterrestrials. But this whole story found a new chapter, probably one of its last, about a month ago, when fisherman Josoé Ortiz, from Palmares do Sul, ended up capturing one of the pieces of the plane in one of his nets for fishing for mullet. 

FAB 4831 Lagoa dos Patos F-5 FAB
Piece of found in Lagoa dos Patos by fisherman Josoé Ortiz. Photo: Cristian Yanzer – Personal archive.

Josoé then ed a colleague who sought to put an end to the mystery. Cristian Yanzer is an airline pilot and sailor. In an interview with AEROFLAP, he says that as a child, he witnessed several of these aerial trainings while fishing with his father in Lagoa do Casamento. 

Around the age of 12, the aviator, who is now 44 years old, learned the story of the pilot and the FAB plane that disappeared in those waters. “Being a fighter pilot was a childhood dream and I attended Canoas Air Force Base most of my adolescence, always hearing about the 4831”, tells Yanzer. 

The pieces found by Josoé were identified by Yanzer as pieces of the F-5's and fuselage.

For five years he has been navigating the region of the accident, trying to find answers to the many questions about the disappearance of the 4831 and its pilot. But he says that without Josoé's findings, it would have taken years. “It was the crucial clue as he was fishing very close to the wreckage… Chance ended up helping”, scores. 

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Cristian Yanzer – Personal archive.

“He collected small pieces of the and some parts of the fuselage. Most fit in the palm of your hand or little more. But it was enough to make me sure he was in the vicinity of the impact site.”

On 11/08, Yanzer took advantage of the good weather and left with the sailboat Viking, equipped with sidescan sonar, to probe the area.

“Metallic reflections visible on the equipment screen indicated many pieces, some large, scattered across the bed of the Lagoon, in a different place than we expected, and about 100m from the place where their nets were placed.”
 
Cristian Yanzer – Personal archive.
He ed the Fifth Regional Air Command through Colonel-Aviator (R1) Antonio Biasus, former commander of the Pampa Squadron and contemporary of the missing aviator. In a meeting with Major-Brigadier Rivero, commander of the military organization, Yanzer agreed that he would try to record images of the wreckage before the FAB, alongside the Brazilian Navy, went to the scene. 
 
Finally on 01/09, Yanzer and his wife Andrea found the largest piece of the F-5 4831. Forty years after going to the bottom of the lagoon, a part of the afterburner of one of the General-Electric J85-GE- 21 returned to the surface.
 
“When anchoring in place to prepare lunch, I felt that the anchor had caught on something. When we started to weigh anchor, to our surprise, this piece of about 0,90m and over 100kg appeared and it was a lot of work to tie it to the boat, which is small for this type of piece.”
 
With the findings and the exact location, the FAB and the Navy began their movements. Yanzer told AEROFLAP that, this Monday (01), the Navy “He will make the first access to the site and then the divers will do the task [task] of collecting the wreckage. There will be an operation briefing with the ship's crew and divers to present the results of the surveys and guide their actions.”
 
F-5 remains Lagoa dos Patos fab
Cristian Yanzer – Personal archive.
He says that after recovery, the remains of the 4831 will be forwarded to BACO and the Pampa Squadron. “Possibly they will be dealt with by CENIPA which will possibly add information to the final report.”
 

Commander Yanzer's expedition, named “Missão Tigre na Lagoa”, has, however, a special objective. “The most important thing, in my opinion, will be the encouragement for the Aviator's family, who together with the FAB will finally be able to give this warrior a resting place and, who knows, a military funeral.”

Cristian Yanzer – Personal archive.
“They have suffered a lot all these years from the anguish of a never-ending cycle. I pray they find comfort at this time.”, he replied, when asked if he had with Lieutenant Chiapetta's family. 
 
Reporting the results of his latest navigation in search of 4831, Yanzer praised the aviator. “In my lay observation of the wreckage, I feel that, with the fiber of a Brazilian hero and the determination of a hunter from the Pampa, he fiercely tried, until the end, to bring his game back home, unfortunately, losing his life in the fight, going to fight we stop from the celestial infinity.”
 
One of the many mysteries and stories of Lagoa dos Patos comes to an end, 40 years later. 
 
Photos: Cristian Yanzer, jetphotos

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Gabriel Centeno

Author Gabriel Centeno

Journalism student at UFRGS, spotter and military aviation enthusiast.

Categories: Military, News, News

Tags: desaparecido, F-5, fab, RS, usaexport

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