Canadian authorities say Sikorsky-92 A helicopters need gearbox part replaced . The aircraft on the south coast are unaffected . '' FAA to issue emergency directive for repair , Canadian safety regulator says . Four British Army helicopters are in Scotland to replace a part . Sikorsky-92 A crashed last winter off Newfoundland ; 17 people died .
Canadian authorities say Sikorsky-92 A helicopters need gearbox part replaced . FAA to issue emergency directive for repair , Canadian safety regulator says . Four British Army helicopters are in Scotland to replace a part . Sikorsky-92 A crashed last winter off Newfoundland ; 17 people died .