There may be some chinese whispers going on here.
Have the crew/pilot been sacked - highly unlikely. Closer to the truth will be they've
1. Been re-appointed (and not necessarily because of the accident) to new jobs in line with normal appointing cycles.
2. Heard a rumble that one/some of the crew had resigned anyway, before all this happened so would be off to gardening/resettlement stuff!
VVHA
Can't see your chinook style thread appearing at a rapid rate. At the mo it appears that someone screwed up, unless the BOI can find a technical prob, so the defence could be pretty weak!