European safety authorities have refined the inspection regime for Rolls-Royce Trent 900 engines, following the uncontained failure of a powerplant on a Qantas Airbus A380.
Precautionary examinations have been undertaken on Trent-powered A380s since the 4 November incident.
But in a new airworthiness directive today the European Aviation Safety Agency states that there is a "need to amend the inspection procedure" following further information from the inquiry and the gathering of data from in-service engines.
EASA says the revised inspection retains the need to examine the air buffer cavity and focus on oil service tubes within the high-pressure and intermediate-pressure structures. Compliance intervals remain unchanged.