@GottaLaff@greenorchids The exhaust damper incident was 10 hours before. If it didn't damage the engines, I can't see how it was directly a cause. It's more the response to the backup generator failing - switching transformers and circuit breaker panels - suggesting electric fuel pumps or something similar. I've had electric fuel pumps fail, and it's not easy to find the cause (eg: a bad wire). It reads like the crew made a guess & got going when the power held for longer than before.