Before having a go at jerome have a look at the comments on the polar bear thread.
My intro to the RAF was overhearing conversation at entrance to mess:
A: All of them killed.
B: Who was the captain?
B: Can't quite place him.
A: You know xxxx, a bit anaemic looking.
B: He's fvkin' anaemic now all right!
Considering RPGs are 10 a penny I'm not surprised one eventually got a lucky shot in, seems every bloody contact includes at least 1 RPG. Remember a Chinook is a big bloody chopper and it doesn't need Tom Beringer to be able put one in a sight picture.
A lucky shot at a Chinook hovering over an insecure LS in close proximity to the enemy. It's a big vulnerable target - even at night.
Condolences to the families and comrades of the personnel killed - a tragic loss of life.