We had a nose gear collapse on landing, was a grass runway.
Was a 3 blade prop on an IO360A1B6, stopped in 12 blade strikes.
Repaired to the full Lycoming sudden engine stoppage service sheet.
300 hours later the engine nearly fell to pieces due to very high internal wear.
Comments from engine overhauler was he had seen far better 2800 hour engines.
We think the case hardening on the ancillery gears was micro cracked, due to shuttling on the sudden stoppage. We believe this then shed hardened steel particles into the oil and caused all the wear. The ancillery gears are not on the must change list, but I think they should be.
50 hours after the rebuild the case then cracked. Low rmp sudden stoppages with two of a three blade prop digging in on grass put a very high bending strain on the crankcase.
Any sudden stoppage is expensive and serious, beware.
Last edited by horizon flyer; 21st Jul 2017 at 21:39.