Operators of Robinson R44 helicopters are being advised to inspect the security of their helicopters' hydraulic-boost servos following a fatal accident at Cessnock Aerodrome, NSW.
On 4 February 2011, a Robinson R44 Astro helicopter crashed after part of the aircraft's flight controls separated from the hydraulic-boost system during circuit operations. The pilot survived, but the flight instructor and a passenger died in the accident.
The Australian Transport Safety Bureau's (ATSB's) preliminary factual report, released today, reveals that a bolt securing part of the flight control system had…