Rotorbike......If I renew my single pilot IFR in a crew served aircraft but fly two crew....must I then do a multi-crew IF ride? Example....Bell 212 or 412 may be flown single pilot IFR but usually is done with a two pilot crew. Situation: Airtest for an annual C of A on a 212 requires single engine height climbs which has to be done IMC/IFR in order to complete them per the C of A requirement. I am authorized to fly the 212 single pilot, have a single pilot IF rating on the 212, can I file IFR or fly IMC ? If I take along a second pilot who does not have an IF rating in the 212,but does have the IF rating in six other helicopters, may he handle the controls while IMC?