Learjet 135 180 ETOPS EO speed

[LOKE]

Has anyone come up with a reasonable engine inoperative speed for Learjets (circa 31) to comply with staying under the 180 ETOPS limit for FAR 135? The only published OE speed is long range cruise, in the AFM – way too low for ETOPS computations – need a minimum of 335 TAS.

I’m from 121 Ops and haven’t had to deal with this before – but where do you go? Does Lear (now Bombardier) provide these numbers or would you look to SABRE or some other Computer Flight Plan Service?

Apologize for such a basic question – I’m new at this game – in this type of equipment.

Thanks for any information or suggestions.

LOKE

[galaxy flyer]

Single engine LRC would be the correct number. Considering the LR 30-series can only fly on 2 engines for 3-4 hours, depending on exact model, it is a bit hard to see ETOPS being a player. It is not certified for ditching, probably doesn't have the legs to make ETOPS.

What routes are you considering? NA to Europe, most folks go The Maritimes, Iceland, UK. Trans-Pac is pretty much PANC, PAOM, UHPP or UHHH only.

GF

[Rainboe]

The official ETOPs OE speed will be the absolute maximum TAS the aeroplane can manage in order to maximise the theoretical 180 min range. It will have no connection with long range cruise or engine out cruise, more with the absolute maximum capability of the aeroplane at drift down altitude. Expect an extraordinary number! The Captain still has the option of deciding if he wants to use that speed or cruise at a more sensible long range OE speed which would take the distance to more than 180 minutes on the day. But we are looking at an academic range only here, not necessarily a practical one!