This accident was the result of fine clay particles within the engine fuel system causing a momentary reduction in engine power. Fuel contamination is a greater risk for operators that conduct refuelling in the field or at remote locations.
Clear guidance material for remote refuelling procedures is not readily accessible to general aviation operators. Advisory Circular AC91-22 and the Fuel Management – Good Aviation Practice booklet both contain some information under the heading ‘Fuelling Procedures’. However, this content is limited with regard to remote operations, mobile tanks, in-field fuel handling, crew training and equipment recommendations.
On 24 October 2018 the Commission recommended that the Director of Civil Aviation review and enhance all CAA-published guidance information to better inform the industry on hazards associated with remote refuelling.