28-Jan-2019 Source: Airbus Helicopters
Airbus Helicopters developed, within the 2018 top irritant program, a new solution to reduce the maintenance burden on the Main Rotor Blade vibration absorber for the H145 aircraft:
This solution is available for BK117 C-2 and D2 through Service Bulletins (SB MBB‐BK117 C‐2‐62‐015 and SB MBB‐BK117 D‐2‐62‐010). All products are mixable, the former oil can be used with the new shaft seals and the new oil can be used with the old shaft seals.