Originally Posted by
vilas
Is there anything that forbids APU test when it's running? The answer is NO. Rather if you are not sure if the test was done you should do it.
Below from FCOM PRO NORM SOP
"
If the APU is already running, ensure that the following check has already been completed. If not,
perform it."
Apparently, that note is not included in my FCOM dated 4 DEC 18. I guess it depends on the MSN numbers; the latest we have is in early 3000 series. What's yours?