Originally Posted by
Dave Therhino
I’m pretty sure that’s not correct. You reading that in a Boeing manual of some kind?
the FCOM makes no mention of it.
Both iPad apps for 737 I have mention it (737 cockpit companion and 737 MRG)
“spar valve mounted on the front spar outboard of each strut
- access is through an access panel on the leading edge
- has backup nicad battery to make sure it always has power to close
- the fuel spar valve actuator is interchangeable with the crossfeed valve actuator”
“a dedicated fuel spar valve battery ensures electrical power to close the valves should the hot battery bus become unpowered”
I’ll ask an engineer when I am at work tomorrow.