GEIPAN Case 1994-01-01345 — « AF3532 » [AERO AFR] COULOMMIERS (77) 28.01.1994

Brief

At 13h14 on 28 January 1994, the crew of Air France flight AF3532 — an Airbus A320-11 operating the Nice–London route — observed an unidentified phenomenon off the aircraft's left side while overflying the Seine-et-Marne department near Coulommiers. The chief steward, present in the cockpit, first alerted the captain; ground radar control independently confirmed the presence of the phenomenon. GEIPAN assigned it classification D1, denoting an unexplained case of moderate evidentiary consistency with pronounced strangeness, noting instantaneous disappearance as a defining characteristic. The file was compiled by CNES's UAP investigation unit (then operating under successive names GEPAN, SEPRA, GEIPAN) and released publicly in 2007, with attached gendarmerie procès-verbaux and technical notes.

Metadata

Agency

GEIPAN / CNES

Release

2007-03-22

Type

PDF • .pdf

Length

20 pages

Classification

UNCLASSIFIED (GEIPAN public release, D1 internal classification)

Programs

GEIPAN, GEPAN, SEPRA

Tags

aviation encounter, radar confirmation, instantaneous disappearance, Coulommiers France 1994, D1 unexplained, GEIPAN, Air France A320

Key points

• The encounter occurred at 13h14 local time on 28 January 1994 over Coulommiers (Seine-et-Marne, 77), placing it within controlled French airspace near Paris.
• The reporting aircraft was an Air France Airbus A320-11 on the Nice–London route, designated AF3532; multiple crew members were present, including the chief steward in the cockpit.
• Ground radar control confirmed the presence of the phenomenon cross-cutting the aircraft's path — providing independent sensor corroboration beyond crew testimony.
• The phenomenon exhibited instantaneous disappearance ('disparition instantanée'), the primary driver of GEIPAN's 'marked strangeness' (caractère d'étrangeté marqué) designation.
• GEIPAN assigned classification D1: unexplained, moderately consistent evidence base, high strangeness — the most anomalous tier in GEIPAN's four-category scheme.
• The file was produced by CNES's dedicated UAP unit, which operated under the name GEPAN (1977–1988), then SEPRA (1988–2004), then GEIPAN (2005–present); continuity of institutional record-keeping spans decades.
• Supporting materials include gendarmerie procès-verbaux (official sworn police reports) and technical notes, indicating formal multi-agency documentation of the event.

Most interesting

• The Air France Coulommiers encounter is one of the most-cited aviation UAP cases in European disclosure literature, partly because it combines a multi-witness commercial aircrew with independent radar corroboration in a single file.
• GEIPAN's D1 classification is reserved for cases where the available data cannot be attributed to any known natural, meteorological, or man-made phenomenon — even after full investigation.
• The chief steward's presence in the cockpit during cruise flight over France in 1994 was routine practice; his simultaneous observation alongside the flight crew increases the witness count without requiring a separate ground report.
• GEIPAN released this case as part of its 2007 public archive opening, in which CNES published roughly 1,600 investigation files online — a significant transparency act with no direct equivalent in US declassification history at the time.
• The Seine-et-Marne overfly puts the aircraft roughly 50 km east of Paris Charles de Gaulle, in one of Europe's most radar-dense airspaces, making the independent radar confirmation particularly notable.
• Instantaneous disappearance ('disparition instantanée') recurs as a descriptor across multiple D1-class GEIPAN cases and has no satisfactory explanation in conventional aerodynamics or atmospheric optics.