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| Date: | Sunday 23 June 2024 |
| Time: | 12:00 |
| Type: |  Shark Aero Shark |
| Owner/operator: | Air Trégor |
| Registration: | F-JBBY |
| MSN: | 116 |
| Engine model: | Rotax 912 ULS |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Keravel - Saint-Pol-de-Léon (Finistère) -
 France
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Lannion-Servel Airport (LAI/LFRO) |
| Lannion-Servel Airport (LAI/LFRO) | |
| Investigating agency: | BEA |
| Confidence Rating: |  Accident investigation report completed and information captured |
A Shark ultralight plane crashed following a loss of control during cruise without external visual references. Both on board died.
The pilot took off from Runway 29 at Lannion Airfield at 11:45 for a flight over the island of Ouessant, located approximately 120 km away.
Three minutes later, the pilot left the Lannion self-information frequency and contacted the Iroise Flight Information Service. He stated that he would navigate along the coast toward Ouessant and climb to an altitude of 1,500 feet. He specified that he would not perform a touch-and-go at Ouessant. The pilot acknowledged the QNH provided by the controller and climbed to 1,500 feet. This was his last radio transmission.
After a few minutes, the pilot descended to around 600 feet and carried out two turns with variations in altitude.
At the end of these turns, at 800 feet, the ultralight aircraft climbed rapidly and its speed gradually decreased until it reached approximately 50 km/h at 1,800 feet. The angle of attack (AOA) alarm sounded. Significant variations in load factor were observed, with the lowest recorded being 0.2 g. The engine RPM and manifold pressure suddenly dropped. Ground witnesses reported hearing engine misfires.
The ultralight then descended at a rate exceeding 10,000 feet per minute to about 540 feet. Engine parameters recovered. The “over-G” warning sounded, and the accelerometer registered a vertical acceleration of approximately 8 g as the pilot attempted a recovery maneuver. One witness saw the ultralight pass overhead and then enter a cloud. At the final recorded moment, the aircraft was climbing again at 1,150 feet, at a rate of 2,500 feet per minute, with a speed of about 68 km/h. A second witness then observed the aircraft diving toward the ground almost vertically before losing sight of it. The ultralight collided with the ground.
The investigation was unable to determine what weather information the pilot had available before departure. However, the pilot undertook the flight when the weather conditions at the departure aerodrome were marginal and the available weather information indicated unfavorable conditions for visual flight on the planned route.
Although he had planned to fly at an altitude of 1,500 ft, the pilot descended gradually to 600 ft, probably to stay below the cloud cover. After several turns and altitude changes, most likely to avoid clouds, the pilot entered the cloud layer and lost external visual references. He then lost control of the microlight, which collided with the ground a few minutes later.
The pressure induced by carrying a passenger may have led the pilot to maintain his navigation plan because the flight had already been canceled once. In addition, the flight purchased for the passenger was scheduled for Ushant, west of Lannion. The pilot may therefore have been encouraged to head west when conditions were more favorable for visual flight in the eastern sector of Lannion. Once the flight began, it was all the more difficult for the pilot to make the decision to change the route or shorten the flight.
Accident investigation:
 |
|
Sources:
https://www.ouest-france.fr/societe/faits-divers/a-saint-pol-de-leon-un-ulm-secrase-dans-un-champ-deux-personnes-decedent-b3e61fa6-3150-11ef-9926-0fa5c94ac444
https://www.letelegramme.fr/finistere/saint-pol-de-leon-29250/un-ulm-sest-ecrase-a-saint-pol-de-leon-de-nombreux-secours-sur-place-6610340.php
https://www.flightradar24.com/data/aircraft/f-jbby#35cfcff1
https://www.air-tregor.com/%C3%A0-propos
https://i40.servimg.com/u/f40/12/44/01/83/img_0310.jpg : Photo
https://tinyurl.com/2ejj73e9 : Google map
Location
Images:
Photo: BEA France
Media:
?? : deux morts dans le crash d’un ULM Shark Aero Shark F-JBBY de Air Trégor dans le Finistère à Saint Pol de Léon (29).
— PLANES OF LEGEND ✈️ (@PlanesOfLegend) June 24, 2024
L'appareil avait décollé de Lannion (22).
ASN: https://t.co/tMPvgowUeH
Presse: https://t.co/6bhQvYMbiP
? pic.twitter.com/CA6qOWx6IQ
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Jun-2024 15:13 | gerard57 | Added |
| 23-Jun-2024 17:44 | ASN | Updated [Aircraft type, Registration, Cn, Source, ] |
| 23-Jun-2024 17:46 | ASN | Updated [Departure airport, Source, ] |
| 23-Jun-2024 17:49 | ASN | Updated [Operator, Source, ] |
| 24-Jun-2024 18:51 | Iceman 29 | Updated [Category, ] |
| 24-Jun-2024 18:51 | Iceman 29 | Updated |
| 26-Jun-2024 09:55 | Iceman 29 | Updated [Source, ] |
| 26-Jun-2024 10:09 | Iceman 29 | Updated [Location, Narrative, ] |
| 26-Jun-2024 10:09 | Iceman 29 | Updated |
| 28-Jun-2024 20:46 | Iceman 29 | Updated [Embed code, ] |
| 28-Jun-2024 20:48 | Iceman 29 | Updated [Embed code, Photo, ] |
| 20-Jun-2025 16:44 | ASN | Updated [Destination airport, Narrative, Accident report, Photo, ] |
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