Perhaps they identified an issue with the aircraft that had the maintenance problem and they are checking the other aircraft for the same issue.,Where are all the older C-32As? Haven't seem much of them lately.
RAF Tanker ZZ335 RRR9302 towed two F-35B types to Lajes today.
Maybe coming over to work with US Marines Stateside.
I have not looked at aircraft ADs for years (okay well since I retired) but there may be something in the ADs related. Unless of course it is specific to the C32 aircraft type.