Eurocopter is requesting operators of all EC135 twin-engine light helicopters to carry out checks on the type’s fuel supply tanks and fuel monitoring systems. The move follows the recent short-term grounding of the U.K.-based fleet of EC135s operated by Bond Air Services after a series of what have been described as “supply-tank fuel-gauging errors on some aircraft.” Two alert service bulletins (ASB) were issued by the manufacturer on Dec. 19. The first calls for a mandatory one-time ...


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