European safety authorities are ordering inspections of propeller blade root bearings following the in-flight blade loss which badly damaged a Fokker F-27 freighter departing Paris.
Fatigue failure of a bolt securing the blade to its root bearings was discovered by French investigators following the 25 October accident involving the Rolls-Royce Dart-powered aircraft.
The detached blade passed completely through the fuselage of the F-27, operated by Italy’s MiniLiner for Europe Airpost, entering the left side and exiting the right.
In an airworthiness directive the European Aviation Safety Agency identifies the propeller as a Dowty Propellers R193.
It is ordering a one-time inspection to assess the condition of blade root bearings on the R193 and other propellers fitted to types including the British Aerospace HS748.
EASA says the inspections also need to verify that the correct blade bolt torque has been applied. If there are signs of grease leakage on the blade, it adds, it must be removed from the aircraft and a detailed examination performed.