SAAB 2000 tech question

[misterblue]

Can anyone enlighten me on the operation of the APR system on the Saab 2000. Does it feather the dead prop, increase power on the working engine, or am I barking up the wrong tree?

Any help will be appreciated.

Thanks

MB

[mjv]

Hi MB,

you are not far off the track,

APR active:

if a FADEC is sensing a power drop >=25%, power will increase by approx. 11% = 111%PU only in TOGA or flex take off modes!
PU passing 45%, FADEC has a closer look to your NG (guess it was 56%) try's to relight the whole thing. further drop: shut down and feather.

if your APR button is selected off:

not a "big" change, you will have only 100%PU available.


:ok:


brgds

mjv