Originally Posted by
360KIAS
If you are not privy to the cost of a single cracked cold section vs. thousands of hours of APU fuel, I cannot help you.
I’m just tying to figure out how if I back out of the gate in JFK, start 1 and keep the APU going, then start #2 about 45 mins later, how that will “crack a cold section,” versus starting 1 and 2 initially, then taxiing for 45 minutes. How does not starting an engine cause wear and tear?