The installation on this Legacy is different than most.  It uses a manual wastegate and the left and right turbos aren't tied together.  At least that's the way it was when it was originally built.  It's also a Lycoming. 

Ron

-----Original Message-----
From: Colyn Case <colyncase@earthlink.net>
To: lml@lancaironline.net
Sent: Thu, Sep 9, 2010 7:53 am
Subject: [LML] Re: Engine failure ATC Transcript Super Legacy Twin Turbo TSIO 580

notwithstanding Charlies' comments I don't understand exactly what happened to 3,4,6.   The video says Mark tried moving the mixture both directions with no success.   I'm not understanding why that didn't help...unless half the cylinders have reduced pressure and other half have higher pressure so there is not optimal mixture.   Also why 3,4,6 and not 2,4,6.   Was this a Lycoming?  also, also, why did the plugs foul so quickly?

on a Continental the turbo outputs are merged so that if you lose, e.g. one hose, you would lose pressure on all cylinders.   at least then all cylinders face the same mixture situation.

anyway, just trying to figure out how you would manage this on a continental.

On Sep 8, 2010, at 11:48 AM, randy snarr wrote:

All, Below is a link to a youtube video which contains a transcript of a Legacy pilot who departed Redmond, OR  on an IFR flight plan. He climbs IMC to his assigned altitude at 21,000 and at 20,000 there is a big BANG!! and the engine quits. I only hope I would handle the same situation half as well... Needless to say this is a harrowing story. The story has a happy ending but harrowing none the less. When listening to the audio, you forget how serious the situation is because he is so calm. The pilot is a friend of mine and I happened to call him 30 minutes after he landed and he recounted the tale to me. He told me the scariest part was not when the engine quit but when he was forced to descend into dark ugly IMC/ and Icing conditions with a dead engine. Oh, over the mountains!  He got icing on the way up and his new deicing system was working perfectly. He knew he would most likely get it on the way down as well, this time with a dead engine and potentially little power to run the deice system. Upon landing, it was discovered that a turbo hose blew off in climb and when that happened because of the sudden loss of boost, it completely flooded the engine fouling the plugs. Mark did an excellent job getting the airplane and himself down in one piece.   He travels the country weekly and spends around 3 days a week traveling this this airplane. His experience and proficiency definitely shows in this situation... Above is part A of the transcript. You will see part B when the video ends... Nice work under pressure... Randy Snarr N694RS http://www.youtube.com/watch?v=nluZTFu2tCQ

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