The major source of problem was the coordination between ONA
cockpit crew and the ALM
cabin staff. In this day and age, on ACMI contracts, there was very little interaction between different teams of different companies.
I have flown many such contracts. Not much communications, no CRM...
"Oh, you did ding the cabin chime 3 times, what does it mean...?"
Briefings and communications were kept to a minimum. You guys do your things, we do ours...!