Turbocharger cool down time

[N201MKTurbo]

1 minute ago, kortopates said:

Way to complicated to do a full mag check!

The much simpler way to check p-leads for a hot p-lead is while at idle rpm, move the key to off momentarily just long enough to tell that the engine is dying but go back to both before it dies and then kill the engine with mixture.

If the engine doesn't show its dying in the off position you have a hot p-lead and exercise caution.

It won't cause backfire done at low rpm and is quick and easy.

It won’t cause harmful backfire at low power. It could still backfire.

[jlunseth]

It certainly would tell you if you have a bad P lead.  I have been to several of the Mooney PPP clinics, which are pretty good by the way, and the veteran instructors have made many comments about keeping the run-up short because it sucks in stones and chews up the blade. So I don’t ever do a shutdown run up, because I am always going to do a pre-takeoff run up. In other words, I do just one between flights. Was never taught a shutdown run up, that’s my excuse. It certainly would tell you if a P lead is bad. But the quick switch off and switch on does the same thing and it is pretty easy to hear if the engine is still making power in the off position. It eliminates one run-up and less wear and tear on the blade. If you are the guy paying for the blade you want to preserve it, I have been through one new blade, not cheap. I guess the trade off would be that if something happened to the mag during the flight you will only know it when you are ready to go on your next trip, only to find that you can’t. That has happened to me only twice in the 13 years I have had the plane.

Edited February 5, 2023 by jlunseth

[Pinecone]

52 minutes ago, jlunseth said:

That manual page is interesting. Do you turn the boost on for landing in the Encore? 

Nope.  Only Normal procedure that uses the boost pump is switching tanks.

Several emergency procedures call for High Boost Pump and a few that use Low Boost Pump.

 

[rbp]

 

Through the magic of Garmin's EIS, here's the last 10 minutes of my flight, from pattern (1200 MSL) to shutdown.

Blue line on the top graph which flattens out at 00:52 is fuel flow, and is a proxy for throttle setting.

Blue line on the bottom graph which flattens out is altitude, so you can tell exactly when I landed. 

As has been suggested here a few times, EGT (bottom graph), CHT (top graph), and TIT (bottom graph Black line) are all at the lowest point immediately after landing