CAPFlyer wrote:
Is this internal or external to the valve? I ask because I had a couple of 737 fuel manifolds that did that externally and had to be replaced because of concern for contamination.
I don't know for certain since the particular valve has never been shown in the press, but since the leak was spotted on the ramp and 'fixed' without defueling I'd guess it's externally mounted.
Are you talking about the spar shutoff valves or the refuelling manifold in the right wing leading edge? If the spill prevent flap works correctly you should get just under a quart of spilled fuel (bring a spill sock) when you pull the spar shut off valve, and a 'droozle' when you pull the fueling point valves.