PPRuNe Forums - View Single Post - What exactly do “attempt” and “cycle” mean in these starter duty limitations?
Old 24th Dec 2020, 08:26
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SpNahata27
 
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Devil What exactly do “attempt” and “cycle” mean in these starter duty limitations?

Hello Professional Pilots and Engineers Seasons Greetings.
Can someone please explain me this... A320 Starter Duty Limitation in simple terms?
E.g. for the CFM56 Starter:
No running engagement when N2>20% 4 cycles of max 2 mins
Pause between start attempts . . . . . . . . . . . . . . . . . .. . . . . . . . . 20 sec
Cooling period after 4 attempts . . . . . . . . . . . . . . . . . . . . . . . . . 15min
Does it mean the moment I put Engine Master to ON till Automatic abort by FADEC in case of Automatic Start or Manual abort by turning the engine master and man start button off (limiting it to 2 mins) in case of Manual start = 1 Cycle.
Then 20 Seconds gap.
Then Next Cycle and so on and then say after 4 unsuccessful cycles I got to wait for 15 min.

But things get confusing between words Cycle and attempt.
Since for another type of Engine it says
Auto start with up to 3 start attempts is 1 cycle.
Between successive cycles – 20 seconds pause (for auto or manual ground starts).
After 4 failed cycles – 15 min cooling period.
What is attempt and what is cycle? I hope someone explains it in real simple terminology.
I am newly released Commerical Pilot pursuing A320 Type Rating. Help from experienced A320 Pilots and Engineers is highly appreciated.
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