Mickjoebill writes:
Perhaps the fact that Erwin Tumiri, the flight engineer who is one of the two crew members who survived, had prepared himself for the crash, is an indication that more passengers could have survived if they had been warned?
That Tumiri braced himself was said in early reports; in later interviews, he denied doing that, said there was no indication from the flight crew to the cabin that anything was amiss, the first indication being when the lights went off. At that point, he says he did "put on the harness", which I take to mean the shoulder harness on the crew seat (as he'd earlier said he had the belt fastened). So, no brace position, but he was somewhat better prepared than the others if he had a shoulder harnesss on.