The recent spate of airline accidents has not yet translated into increases in airline hull insurance, said an executive at Aon, out of London; however, the broker did not rule out increases for fourth-quarter renewals.

Aon said that four airline crashes in quick succession have brought to an end a long period of relatively benign loss experience for the aviation insurance market.

August is now the second most expensive month, in terms of losses, for the airline industry since January 2002, Aon said. Despite the losses, for aircraft hulls valued at over $170 million the monthly trend in the cost of losses has continued to fall steadily.