Whilst -ICV may have been the prototype 400F first flying in 5/93, it sat in the desert for a couple of years whilst AF tried to sort out industrial relation problems surrounding the disappearance of the F/E and was not delivered to CLX until 9/95.
-FCV and -GCV were however delivered in late '93 and consequently have had their second D checks whereas -ICV has not yet done so.
Will these be the ones to go though? K and L are four years newer.