Originally Posted by
sailingfun
The A320/21 NEO is teetering on the edge of a grounding. The gearbox issue is not going away. Spirit projects 25% of their fleet grounded by Dec. If one of the gearboxes let's loose in flight all bets are off.
None of the NEO problems have anything to do with the gearbox. It is a HPT disc coating issue. You might not know it, but most jet engines have high pressure turbines....
"In July, RTX said microscopic contaminants were found in a powdered metal used in high-pressure turbine discs that are part of the GTF engine's core. The presence of those contaminants could lead to cracks in the engine."