Photo © Tim Samples
i thought that APUs are shut down inflight. at least that's what the EMB-145 and CRJ-200 pilots i talk to tell me. not to say that you're wrong tim, i honestly don't know the truth as to DL's ops specs in terms of running the APU. i was under the impression that it need not be kept running once both engines are operational since the engines are able to keep all systems neccesary running. am i right or wrong? can anyone help?