98 fatalities

Flight BY 105 Crash at Ljubljana (G-ANBB)

Ljubljana, SloveniaLanding (descent or approach)

On September 1, 1966, a Bristol Britannia (registration G-ANBB) operated by Britannia Airways was involved in an aviation accident near Ljubljana, Slovenia during landing or approach. 98 people were killed. Investigators recorded the probable cause as: The pilot-in-command did not set the altimeter to the QFE of 968 millibars as instructed, resulting in an approach approximately 1,250 feet lower than procedural safety altitudes. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

On 31 August 1966, a non-scheduled international flight from Luton to Ljubljana crashed into trees during a night approach. The aircraft was destroyed, killing 98 of 117 occupants.

Flight Details and Approach Sequence Flight BY 105 was a non-scheduled international flight operating from Luton, England, to Ljubljana, Yugoslavia, for the transport of tourists. The aircraft departed Luton at 2110 hours GMT on 31 August 1966, carrying a crew of 7 and 110 passengers. During the approach, the crew maintained continuous radiocommunications with the Zagreb Area Control Centre and Ljubljana Aerodrome Control. The controller provided meteorological information, including a QNH of 1011 millibars and a QFE of 968 millibars, and instructed the crew to descend to 4,500 feet by QNH while holding in the left pattern after Dolsko. The crew acknowledged the information and confirmed they had runway 31. ## Radar Contact and Final Approach The pilot inquired about the status of the Instrument Landing System (ILS), and the controller confirmed it was operating normally. The crew reported reaching 4,500 feet and requested radar assistance shortly before the accident. The controller provided position updates, noting the aircraft was turning to the right, and issued a correction of 3 degrees left. When the aircraft failed to correct, the controller asked if the pilot was making a short right turn to the radio beacon Menges. The crew did not reply, and radar contact was lost at 0047 hours local time on 1 September 1966 (2347 hours GMT on 31 August 1966). ## Crash and Casualties Fire and smoke were observed from the tower, prompting the controller to issue an alarm and initiate emergency measures. Rescue services located the crashed aircraft on fire in a wooded area 15 minutes later. The wreckage was situated 2.8 kilometers southeast of the threshold of runway 31 and 0.7 kilometers north of the extended runway centerline. The aircraft was destroyed by impact forces and a post-crash fire. A crew member and 18 passengers were evacuated to a local hospital, while 98 other occupants were killed.

Probable cause

The pilot-in-command did not set the altimeter to the QFE of 968 millibars as instructed, resulting in an approach approximately 1,250 feet lower than procedural safety altitudes. The copilot's altimeter was set to the QNH, and the crew failed to perform cross-checks of the two altimeters as required by the operations manual. This error went unnoticed due to the moonlight night conditions, calm weather, and the visual effect of the runway slope, which gave the pilots a wrong impression of the approach angle.