Draining AW139 MGB and Engines
I purchased a hand powered vacuum type oil removal pump / tank from a local marine supply and it works real well. Depending on what brand you get you can adapt it to the MGB drain hose using cheap plastic hose adapters. It came with some small tubes so you can also pull the oil cap adapter on the PT6 and drain the engines also. No more messing around with the drain plugs that are so close to the horizontial firewall there is no room for a drain pan. Total cost $60 dollars.
Agusta Electric Pump $$$$$$$$$$$