Unexplained Trent 1000 surges spur de-pair order to 787 operators

Rolls-Royce is investigating further operational issues with Trent 1000 engines, after instances of surges involving certain powerplants – a situation which has triggered a de-pairing order from European regulators. Trent 1000s, which are fitted to Boeing 787s, have already been the subject of several regulatory interventions, particularly as a result of problems with blade durability. But the surge occurrences appear to be a separate issue. “Investigation into the cause [or causes] of these events is ongoing,” says EASA. The engine surges have particularly affected engines which have accumulated a high number of cycles and flight hours. EASA is mandating this de-pairing scheme through an airworthiness directive which takes effect Jan 30.. <br/>