The National Archives describes its UFO fund (BR DFANBSB ARX): 743 records produced by the Air Force command, from 1952 to 2016, searchable in the SIAN catalogue.
“É importante lembrar que OVNIS não significam necessariamente a existência de discos voadores ou extraterrestres.” source
Page updated 28 October 2020. Record counts differ between sources (743, 753, 758) as the fund grows.
CLASSIFIEDDeclassifiedFILE NO. 009SHEET 2 OF 4
Testimony
Interviews and witness statements: who, in what role, when and where it was said.
WITNESSMarco Antonio Petit, Revista UFO, recounting statements by Col. Uyrangê Hollanda (team leader in 1977) · 2005-12-01
Petit, who co-conducted the August 1997 interview in Cabo Frio, describes it and Hollanda's only public lecture on 7 September 1997, in which Hollanda said his team saw structured craft. A witness account, not a finding.
“Não havia motivo para o assunto ser tratado de maneira diferente e, diante desta situação, preferi ficar calado durante todo este tempo” source
Published by a ufology magazine that holds the interview; Hollanda's words reach us second-hand through it. The date shown is the page's ‘last updated’ date.
CLASSIFIEDDeclassifiedFILE NO. 009SHEET 3 OF 4
Press
Newspaper and magazine coverage, then and now. Linked, never copied.
PRESSFernando Rodrigues, Folha de S.Paulo · 2009-01-11
Reports the release of an 86-page confidential SNI report on the operation, quoting its night logs from October and November 1977. The report does not explain the lights and notes the team's lack of consensus.
“Não há um consenso entre os membros da equipe sobre o que foi visto, mas parece que essa atitude está intimamente relacionada com o receio de cair no ridículo perante os colegas” source
The quote is the SNI report's wording as printed by Folha.
Long account of the operation: the first reports, the team, the medical officer's verdict, the suspension on 5 December 1977, Hollanda's 1997 interview, and the Air Force's statement that all material is in the National Archives.
“Na hora de redigir seu relatório, o psiquiatra deu o veredicto: "Histeria coletiva".” source
Updated 7 July 2021. Several claims in the article come from ufologists and are attributed to them.
PRESSDOL (Diário Online, Pará), with information from Terra · 2014-06-01
The Air Force's press centre says the files on the operation have already been sent to the National Archives, where 300 pages and 150 photographs are held.
CLASSIFIEDDeclassifiedFILE NO. 009SHEET 4 OF 4
Analysis
Our own reading of the file, written from the sources on the other sheets. Opinion is marked as such.
What is documented: the Brazilian Air Force took villagers' reports seriously enough to send a team, the SNI took part, and their logs are now public through the Arquivo Nacional. The logs are plain. Times, places, a light over the water, ‘nothing to report’. They describe what was seen and do not say what it was.
What is not documented is most of the famous story. The large craft at close range, the hundreds of photographs and the sixteen hours of film come from Hollanda's interviews in 1997, twenty years later. The released records hold some photographs of lights; the films have not appeared. The team's own medical officer wrote collective hysteria, and the SNI summary says the team did not agree on what it had seen.
Our label is Unexplained because an official body investigated and the records reach no conclusion. It would move to Explained if a final COMAR 1 report or the missing material identified the lights, and it says nothing either way about the injuries villagers reported.
What it shows
That the Brazilian Air Force ran a field investigation of lights reported around Colares in late 1977, and that its records are held by the Arquivo Nacional.
That the intelligence service SNI took part and logged lights its observers could not identify; the team itself reached no consensus.
That the Air Force says it has released everything, while the archive notes that the films described by the team leader are not available.
What it doesn't prove
That the lights were craft of any kind, let alone non-human ones. The released records do not say what they were.
That lights caused the injuries villagers reported. The team's medical officer concluded collective hysteria.
Hollanda's accounts of craft at close range and hours of film. They come from 1997 interviews, not from released documents.
The other side
The case for an ordinary explanation is strong. The Air Force's own medical officer, after hearing witnesses in October 1977, wrote ‘collective hysteria’. The region was in a panic: villagers lit fires, banged cans and set off fireworks at night, and the press covered it closely. In that climate every bright light becomes a sighting. The released logs show lights at a distance, often ‘nothing observed’, and nothing that rules out stars, boats, aircraft or natural phenomena. ‘Unexplained’ may only mean ‘never properly checked’.
Did COMAR 1 write a final report with a conclusion, and is it among the files the Air Force says it has already released?
Where are the films Hollanda described? The Air Force says everything went to the archive; the archive's own essay says the films have not been made available.
Why was the operation suspended on 5 December 1977, days after its leader reported his most striking sighting?
Other analyses
OFFICIALRodolpho Gauthier Cardoso dos Santos (historian), on the Arquivo Nacional's ‘Que República é essa?’ site · 2021-04-29
The archive's own guide to its UFO holdings. Says the team led by Hollanda investigated at least 130 cases in 1977–78, that some photographs are in a digitised report, and that the films he described have not been released.
“Segundo relato de Uirangê Hollanda, os oficiais teriam feito também filmagens, mas estas até o momento não foram disponibilizadas pela FAB.” source
Written in Portuguese; summarised here in English. The page links to the digitised report BR_DFANBSB_ARX_0_0_0184.
TO VERIFY Candidates, not yet checked
The digitised report BR_DFANBSB_ARX_0_0_0184 on querepublicaeessa.an.gov.br (linked by the Arquivo Nacional essay): the server returned a file over 50 MiB that could not be opened in this session, so its contents are not cited.
The SIAN catalogue entries for the Operação Prato dossiers (sian.an.gov.br requires a login); exact item numbers and dates not checked.
Revista UFO issue(s) that printed the 1997 Hollanda interview; the magazine's own pages disagree on the month (June or August 1997) and the issue number.
Exact date of Hollanda's death in 1997 (BBC Brasil: two months after the interview; Petit: less than a month after the 7 September lecture).
Estadão, ‘Aeronáutica libera documentos sobre aparição de óvnis’, and O Globo / G1 coverage: not opened (G1 refused automated access).
Whether COMAR 1 issued a final report or a 1979 compilation of observation records; mentioned on secondary sites only.
Found, but not linked to a source we trust. Not on the sheets until they are.