Check Airman
16th May 2020, 02:15
Gents and ladies,
The more recent MSNs have transfer valves in the centre tank that use motive flow to get fuel out of the centre tank. The energy for the process comes from the wing tank pumps. I'd expect the on-side centre tank "pump" to be inoperative should both wing pumps fail, however, there's no mention of this in the MEL. I take that to assume the ctr tank fuel would either be unusable, or only accessible via the crossfeed. Am I over or under thinking this? If it's unusable, I'd think the MEL would cover this eventuality, but it doesn't.
Thanks
The more recent MSNs have transfer valves in the centre tank that use motive flow to get fuel out of the centre tank. The energy for the process comes from the wing tank pumps. I'd expect the on-side centre tank "pump" to be inoperative should both wing pumps fail, however, there's no mention of this in the MEL. I take that to assume the ctr tank fuel would either be unusable, or only accessible via the crossfeed. Am I over or under thinking this? If it's unusable, I'd think the MEL would cover this eventuality, but it doesn't.
Thanks