That's the furthest thing from the truth I've heard in a while. Sentence by sentence: You can start the engines off Battery Power only,
I guess we attended different school then. I attended Braniff Ailines' FE and type school.
I do agree with this.
Bar none it's one of the best remote operations jets in the world.
However, dead APU, no air cart, no go. You land, start the APU, shut the engines down, APU fails, will not restart, no air.
How are you going to start the engines?
One more point we differ.
but can be left on accidentally after takeoff, and will flame out around 25000 feet)
This happened to me twice, on both occasions the APU
did not flame out at FL 250. The APU fire warning coming on and the the fire bell ringing was the first indication that the APU was still running.
Also on both occasions, there was a pilot/FE, not a professional FE riding side saddle.
By the way, I do have over 7,000 hours flying the 727.