LONDON , England ( CNN ) -- Four British Coastguard helicopters of the same model as the one that crashed off Canada last week have been grounded in Scotland to replace a gearbox mounting part , and all those models worldwide are expected to be grounded as well . Sikorsky 's Web site says the S-92 `` is the most advanced aircraft '' in its civil product line . This move comes after the Transportation Safety Board of Canada indicated on Friday that the components must be replaced on Sikorsky-92 A helicopters across the globe . The Canadian agency said the U.S. Federal Aviation Administration will issue an emergency airworthiness directive , effectively grounding all Sikorsky S-92 A helicopters worldwide until the parts are replaced . On March 12 , 17 people died when a Sikorsky S-92 A operated by Cougar Helicopters crashed or ditched in the Atlantic Ocean off the coast of Newfoundland . One person survived . Canada 's transportation board on Friday said investigators found a broken main gearbox component that had been addressed in a January alert from Sikorsky . Sikorsky 's alert , on January 28 , said the `` main gearbox filter bowl assembly mounting titanium studs should be replaced with steel mounting studs . '' This `` one-time modification '' was to be done within 1,250 flight hours or within a year of the alert 's issue date . According to Britain 's Maritime and Coastguard Agency , Sikorsky on Friday notified helicopter contractor CHC that aircraft operating out of Stornoway and Shetland in Scotland need the `` urgent modification . '' The British agency said that when it is clear how long the helicopters will be grounded or need to undergo engineering work , the agency `` will take a decision on implementing a contingency plan for longer term air coverage . The aircraft on the south coast are unaffected . ''
Canadian authorities warn Sikorsky-92 A helicopters need gearbox part replaced . FAA to issue emergency directive ordering repair , Canadian safety board says . Score: 6 Sikorsky-92 A crashed last week off Newfoundland ; 17 people died .