Canadian owners of Lycoming engines that have been recently overhauled should check to see if they’re affected by an emergency airworthiness directive issued by the U.S. Federal Aviation Administration earlier this month. The AD requires the laborious inspection of connecting rod bushings that can work loose and cause engine failure. The connecting rods were supplied by a subcontractor and potentially installed on 778 engines in the U.S. It’s not clear if any or how many made their way into Canadian aircraft. If they have, Transport Canada will undoubtedly issue its own AD.

Lycoming’s handling of the AD has prompted concern among some U.S. owners. The company initially said it would cover the full cost of compliance for those whose engines were rebuilt at their factory but only the parts in field overhauls. The company has since relented somewhat on that position and appears to be assessing field overhaul repairs on a case-by-case basis.