L1011 Pro APU Tip: Latch Tank #2 Valve Before APU Start

According to L1011 CBT:

"The fuel supply for the APU is taken by a taping in the #2 Engine Feed Pipe downstream of the Engine #2 Tank Valve. Because of this, if the Engine #2 tank valve is closed, the APU will be inoperative"

Hope this helps with your TriStar Start Ups

Cheers,

Joshua757