A spokesman for Eurocopter, a unit of European aerospace and defence company EADS, said tests by Bond and two other EC135 operators in Europe found possible similar supply-tank fuel gauging errors that overestimated the fuel on board.
"The first analysis shows that the indication of the fuel quantity in the supply tanks could be overestimated," the company said in a statement.
"All crews should be aware that in the worst case a red warning "Low Fuel" could appear without any amber FUEL Caution before."
Eurocopter said it was issuing a safety notice to remind all EC135 operators to follow the safety procedures already in place and outlined in the flight manual, regardless of the aircraft's fuel quantity indication.
It's that last paragraph that niggles me!