Jaba. There are two separate engines being discussed here.
The J230 was a CHT overheat event. I highly;y doubt it was pre ignition or detonation as the engine gave no rough running sympotm at all, The only indication was the flashing light warning me the CHT was over 180 deg's. That was late upwind, about to turn xwind on a normal 80 kt climbout on a 28 deg day. By the time the turn was completed the CHT was 210 deg's, then 220. That was when I levelled out, reduced power and returned to the strip.Where it subsequently stopped.
My questions relate to the valve failure at 300 hours in the 2200 with an engine that has logged history in 4 channels on CHT and EGT. None of which show anomalies. no overheat issues indicated. jab quote that valve seats start dropping out at 250 degs (see engine inspection report).
When we have one engine that fails at 220 degs, and jab saying 250 is where the seats let go. Why, has this 2200 engine dropped a seat with NO over tempt issues.
Thats the 64000 dollar question