Actually, in total, I have had 3 turbo failures and 1 sick passenger.. I am conservative in my approach to operating this aircraft which may also be a factor.. Normal TO is done with 55 inches MP, normal climb is done at 175~180 psi limited to no more than 50 inches MP, initial climb is FL160~FL200, the highest I've had the aircraft is FL240 [with one step], cruise is 2100 in the range of 150~165 psi [37~40 inches MP], I always use Auto Lean, and plan for a 4300lb/hour [total for all 4 engines taxiout/takeoff/climb/cruise and descent].. I always take a 'heavy' load and get somewhwere between 57~71 pasengers on board..
Honestly, my all time favourite aircraft.. Best of the best!!
I really wish A2A would do a DC-7C that would be something..