According to AMC3 CAT.OP.MPA.200 Special refuelling or defueling of the aircraft:

REFUELLING WITH THE ENGINE(S) RUNNING AND/OR ROTORS TURNING — HELICOPTERS

(a) Refuelling with the engine(s) running and/or rotors turning should only be conducted:

(1) with no passengers or technical-crew members embarking or disembarking;

(2) if the operator of the aerodrome/operating site allows such operations;

(3) in accordance with any specific procedures and limitations in the AFM;

(4) using JET A or JET A-1 fuel types; and

(5) in the presence of the appropriate rescue and firefighting (RFF) facilities or equipment.

According to GM3 CAT.OP.MPA.200 Special refuelling or defuelling of the aircraft:

• Wherever possible, the operator should avoid the use of wide-cut fuel types. If a situation arises such that only wide-cut fuels are available for refuelling/defuelling, operators should be aware that mixtures of wide-cut fuels and kerosene turbine fuels can result in the air/fuel mixture in the tank being in the combustible range at ambient temperatures.