The F/O said nothing and did nothing.
Interesting post Eng123.
I worked at Kimpo for Korean Air some years ago - they have a BA based Res and Check-in system. What an amazing experience.
On my first day there, I still remember being terrified to see the IT director at the time going absolutely ballistic shouting his head off in front of the office at a junior manager for some fook-up or whatever. I actually thought he was going to hit or kill the junior manager. The verbal haranguing went on for 10 minutes solid. But the junior guy (30-35ish years old) just stood there in front of him. Never said a word. Not a single word. He was paralysed.
Yeah, I know very well that's on the ground and not in the air. But having already had a minor boll*cking from his skipper, I would guess the F/O knew exactly what was happening, but just sat there terrified to speak up whilst the man in the LHS drove that 747 into the ground.
Different culture. You have to see it to believe it.