"Ron Wojnar, the FAA's deputy director of aircraft certification services, said any airlines with the pumps are being ordered to keep enough fuel in the tanks to cover the devices even when the planes bank or encounter turbulence in flight.
Well just how much fuel is that, Mr Wojnar?
Mr Boeing says, " Main tanks must be full if center tank contains more than 1000lb/453Kgs"
Does Mr Wojnar state that less than 1000lb in the centre tank is sufficient to keep the pumps submerged in all aircraft attitudes, including turbulence?
In todays litiginous world I'd have thought he was sticking his neck out to suggest that without a lengthy research exercise, and to suggest we might fly around with more than that in the ctr is exceeding a manufacturers limitation.
Not very clear, is it?