|APU slight wet start!|
The main anti-det runs were carried out with Ollie on the external comms, John in the back and myself in the Left hand seat. Young Sam was sitting in the co-pilots seat and I wet-ran the engines. Basically, putting fuel through the burners and out of the back as vapour without actually igniting it. This ensures the fuel system is never allowed to dry out and that the engine has been turned to ensure oil pressure and lubrication. John also checked all 4 main engine alternators were generating AC power. I then let Sam dry turn the engines and he did this very nicely for his first time. A dry-turn is a full spin, but without fuel being introduced and it helps to dry the fuel vapour in the jet pipes.
We then carried out full hydraulic functionals, exercising the flaps to all 3 positions, air brakes to the full range of full out & full in and the Ram Air Turbine scoops (RATs) on top of the rear fuselage. The nosewheel steering was also tested and the Flight Refuelling Hose Drum unit (HDU) lowered and raised several times. The flying controls which are fully powered and self contained were then all tested. No snags were noted, apart from the Starboard RAT sticking in the open position occasionally.