Bell 206L-4 Longranger IV, G-PTOO
The pilot carried out a precautionary landing at London City Airport, after the onset of vibration during the cruise. Examination revealed that a bolt, securing balance weight assemblies to a tail rotor blade, had failed due to the formation of a crack in the bolt shank which propagated in fatigue. The helicopter manufacturer confirmed that this was the first reported occurrence of this nature relating to this design of tail rotor system.
Bell 206L-4 Longranger IV, G-PTOO 07-11.pdf (323.50 kb)