What happened
On September 5, 2018, an Aerospatiale SA 314G ‘Gazelle’ was attempting to depart from the area north of Kortrijk Airport (EBKT). During the takeoff sequence, the helicopter's engine experienced a compressor surge. This sudden loss of engine performance forced the pilot to perform an emergency landing. The aircraft sustained damage during the impact, though no fatalities or injuries were reported.
The investigation
Investigators from the AAIU(Be) examined the technical condition of the aircraft, the engine'-s performance, and the takeoff environment. The inquiry focused on the mechanics of the Astazou IIIA turbo-shaft engine and the specific conditions of the takeoff area. The investigation included a bench test of the engine and an analysis of the red 'ALARM' warning light functionality.
Furthermore, the investigation looked into the operational habits at the north side of the airport. It was noted that helicopters frequently used the area between hangars to take off, often bypassing standard taxi routes by crossing public roads and airport fences to save time. The investigation also reviewed the suitability of the takeoff area in relation to nearby obstacles and the pilot's risk assessment.
Findings
- The primary cause of the accident was a compressor surge within the engine.
- The chosen takeoff area was unsafe, as the pilot had not performed a proper risk assessment regarding the associated hazards.
- The takeoff location was situated between hangars, which presented significant obstacles.
- There was a lack of clear, established procedures for helicopter taxiing and parking at the north side of the airport movement area.
- A long-standing habit existed where pilots would 'jump' the airport fence to avoid long taxiing routes via public roads, a practice that had been overlooked by airport operators.