Recently the "Sky Detectives" documentary aired on French television showcasing the high level of expertise by the French bureau for investigating civil aviation safety, the BEA. Central to the storyline is a project the BEA coordinated in Greenland, in which Greenland Guidance played its part.
On 30 September 2017 a large Airbus A380 airplane lost parts of its number 4 engine, which were scattered over the Greenland ice sheet. Luckily nobody got hurt. An investigation into the cause of the accident was started immediately, but the critical engine piece needed for the investigation, the fan hub, was nowhere to be found in the area searched by helicopters. A new expedition could not be launched until the next spring due to the onset of cold and dark Greenland winter. So in spring 2018 an airborne radar team and a ground radar team combed the 15 km2 search area to find … nothing.
The search for the (now two-part) fan hub proved extremely difficult because the heavy titanium had impacted into the snow surface. It got covered by increasing amounts of winter snow as time progressed, rendering visual detection impossible. Also the radar systems initially proved impractical as subsurface ice layers, of which there are many in this part of Greenland, could be mistaken for engine pieces.
Having improved their processing techniques of the airborne radar data, by 2019 Onera, the French aerospace lab, had identified a few potential targets for the ground team to inspect. And shortly after, on the last day of an expedition suffering from several storm delays, a team led by researcher Ken Mankoff of the Geological Survey of Denmark and Greenland (GEUS) detected a metal object at 3-4 meters below the surface. Right between two large, potentially dangerous, snow-covered crevasses.
The final expedition to the ice sheet took place in June 2019. A team of 5 including 3 Greenland Guidance mountaineers flew to the dig site armed with shovels and lots of safety equipment. The much desired fan hub fragment was extracted on 30 June.
Central to the investigation was the BEA, the French bureau for investigating civil aviation safety. They got all partners together and working towards retrieving the missing fan hub pieces. Recently, Elephant Productions finished a documentary on the BEA in which the Greenland project gets ample attention. The documentary was made for TV channel France 5, and its French title is Les détectives du ciel. It’s a 87 minute documentary that features Greenland Guidance quite prominently!
A shorter, English version called “Sky Detectives” will be broadcasted internationally. Keep an eye on our @GreenlandGdnc Twitter feed to find out where you can see it.
