Can you send me some sort of documentation on this term? I'm not finding anything.

Do you have any idea what does ULA mean regarding engine life limit parts?

Mark,

There is actually a much better version of this document. ABX avionics engineers made a document like this but has the photo of each light in the chart and all PN for LED and Filament. Ask them to share it to you or send me your personal email and i can share to you.

Thanks alot, I really appreciate it.......

All those listed above.

Is there any operation during which engine is kept running and is not shut down between two flights....

Engine cycles are recorded along with aircraft cycles. It is known that engine cycles are always higher in number. Ground taxi and engine power runs for example.

All official records are aircraft cycles. Engine cycles are recorded from time of install, but they are referenced to the aircraft.

You are flying an older aircraft. It has no means of recording every start. The only time that matters for engines is cycles and flight run hours of which run hours holds more importance.

Mark, maybe I don't make my meaning clear....I mean to say how is it possible that number of flights is higher than number of starts? I can not understand how it is related to failed APU and unavailable ground support equipment, GSE?!