During external power operations, how should the mobile power unit be positioned?

• A. Facing away from the aircraft
• B. Unsecured and facing toward aircraft
• C. Not required to be positioned
• D. Chocked and facing away from the aircraft

Answer: (D)

Focus on safety and stability during external power ops. The mobile power unit should be securely positioned so it can’t move and so any exhaust, heat, or fumes are kept away from the aircraft and personnel. Chocking the unit prevents it from creeping or rolling, which is crucial on ramps or uneven surfaces. Facing away from the aircraft ensures that exhaust and any incidental heat or noise won’t be directed toward the aircraft or maintenance crew and also keeps cables and hoses routed clear of the aircraft's surfaces. So the best approach is to place the unit with wheel chocks in place and oriented away from the aircraft.