The Indian authorities have told Indigo that its pilots practice – designed to save fuel – of pushing for a full thrust post-take off climb, is the reason so many of its P&W engines are failing.
The Indian DGCA, their FAA equivalent body, said analysis comparing Indigo, who practice full thrust climbs, and competitor GoAir who use a so called alt-climb approach, show that Indigo engines wear far more quickly and shut down because of the wear, caused by the practice. Indigo doesn’t suffer from these issues using the exact same engine.
Full thrust take offs do save fuel by getting to operating height quickly and efficiently.
Indigo has had 13 in flight engine shut downs so far this year.
Indigo has moved away from the Pratt&Witney engine, choosing to fit the CFM version on new orders, which potentially may make little difference if it continues with the practice of full thrust climbs.
In the meantime Indigo has been told it has to replace every single engine on its aircraft and won’t be allowed to add new routes or flights until it does so.
The airline is basically not commenting, issuing nothing mire than a polite “mind your own business” press release on the subject.