The supplied MiG-21 documentation has the start-up procedure beginning on page 76 (table 7.2)
It states to turn ON the APU prior to engine start but does not state to turn OFF the APU anywhere in the checklist after engine start.
Is it normal for the MiG-21 to continue flight operations with the APU on? Or is this an oversight in the checklist and should be turned off after the engine start procedure?
If the APU is in fact supposed to be turned off after the engine start procedure then it should also be required to be turned ON for the in flight engine restart procedure. Correct?
Thank you for any info. :book: