ABOVE: As of March 2022, more than 3,000 E4-series engines had been produced

The European Union Aviation Safety Agency (EASA) has issued an Airworthiness Directive (AD), dated 6 February 2024, affecting all E4 and E4P engines manufactured by Diamond Aircraft’s sister company Austro Engine (and subsequently DA 40, DA 42, and DA 62 aircraft).

The AD was issued following the inspection of engines after occurrences of engine failure. This identified the potential of certain screws ‘meeting the lower end of their design specification’ to fail when ‘installed on the inner main bearing position’ and in specific operating conditions.

A single ferry flight (not exceeding three flight hours) of affected aircraft may be made to a maintenance location, where the affected main bearing screws must be replaced.