View Full Version : NG Engine start restrictions
Pin Head
16th Jan 2016, 10:33
Hi
Please can someone advise what is Extended Engine Motoring? Why is it different from the normal starter duty cycle?
Many thanks
Pin
Chesty Morgan
16th Jan 2016, 10:47
It is a longer than normal start cycle motoring limit.
The only difference is that it is longer and requires a longer cooling period between cycles.
Pin Head
16th Jan 2016, 12:27
ok, when would it be used? i ve never heard of it. Is it an engineering function?
Chesty Morgan
16th Jan 2016, 14:32
High altitude airport engine starting.
Capt Quentin McHale
16th Jan 2016, 20:19
Pin Head,
Extended engine motoring is used for several functions e.g.
1... cooling engine and lowering egt after a hot or hung start before restart attempt.
2... maintenance motorimg for leak checking various systems e.g. after a fuel,oil or hydraulic filter or component change etc etc.
McHale. :)
STBYRUD
16th Jan 2016, 20:22
And ensuring EGT margin during (by maximising N2 as well as N1) during tailwind starts!