Time Expired Engines Question

[gileraguy]

If a Lycoming engine is over 12 years old, is it "on condition" or is it timex?

[avcraft]

It's calendar time expired. If you continue to operate it, it will be running on condition, refer AD/ENG/4A11

[gileraguy]

thanks for that mate.

[Aviater]

There's many varying opinions on engines and when/if they can be run on condition. Casa says all piston engines must be overhauled or bulk stripped at least every 12 years. If your engine goes to TBO before 12 years, then as long as that engine has met the manufacturers requirements, it may be eligible to operate on condition until it becomes unservicable or 12 years passes since it's last tear down.

Lots of different takes on 'on condition' rules so ask around and talk to your LAME. Ultimatly it's his/her interpretation that will count, correct or not.

You can always email CASA and see what their thoughts are. They will respond, and by keeping a copy of their email you can be sure your sticking to at least one official version of the rule.

Cheers

[peterc005]

My recollection is that the calendar time limit only applies to the Charter category?

[catseye]

Lycoming Service instruction SI 1009 gives the correct answer.

yohttp://www.lycoming.textron.com/support/publications/service-instructions/pdfs/SI1009AU.pdfu :ugh:

[avcraft]

Or you could just read AD/ENG/4A11 and it will clearly explain the requirements for both private/aerial work and commercial operations.

[Jabawocky]

I see you are in Adelaide. Great engine man in your town. One of the best in the country, give him a call. Andrew Denyer Riverina Airmotive Pty Ltd :: Contact Us (http://aviationengines.com.au/contact.html) :ok:

[avcraft]

You're quite welcome gileraguy

[LeadSled]

Andrew Denyer Riverina Airmotive Pty Ltd :: Contact Us (http://aviationengines.com.au/contact.html)

Folks,
I'll second that!!
Tootle pip!!

[mcgrath50]

Uh oh Jaba, you might want to check out this page on their webiste: Riverina Airmotive Pty Ltd :: Technical Articles - Engine Care (http://aviationengines.com.au/tech/enginecare.html)

Shock cooling, cooling before shutdown :eek::=

[Jabawocky]

That was meant to be removed. About 6 months ago when the web developer put up some more fancy web pages.

The information relates to his test stand procedures and not aircraft in flight. But it made its way into the web page

The test stand is different where you can have very hot high power one second and shut down the next.

I will remind him about it. Well spotted indeed. :ok:

[Volumex]

How are you going to throw a tee shirt at him across the interweb?

[mcgrath50]

How are you going to throw a tee shirt at him across the interweb?

I'll call it even, this one time, for all the chocy frogs I owe you Jaba :ok:

[Jabawocky]

No worries, the T Shirts are for the privileged few only ;)

Denyer owes you a chocky frog. I will keep that duly noted.:}

While we are talking about procedures being different for engines on the ground Vs those in the air, this is exactly how the confusion between the LAME and the pilot happens with Turbo "Warm Up" procedures.

The LAME runs your turbo engine up during an annual and he gets things pretty damned hot. So it makes sense for him to let it idle for a minute or so before shutting down. That is good advice. The turbo is still not or may not be as cool as it would be if you fly in and shut down straight away, but it is better than him shutting it down straight away by a good margin.

When you fly the aeroplane.....the opposite happens, so what is good for the workshop is not always best or better, and is often quite different to the world on the wing.