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Date: Sat, 09 Jul 2005 17:53:48 -0400
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Subject: RE: [LML] Re: Turbo Loss Consequences
Thread-Topic: [LML] Re: Turbo Loss Consequences
Thread-Index: AcWEzjv4Lh9+NMZHTGil6wCsOLcJNQAAssJQ
From: "George Braly" <gwbraly@gami.com>

Colyn,

I have had this happen from induction coupling failures on about half a =
dozen  occasions over the last 12 years.

Keep in mind,  this includes a LOT of return to service flights, where a =
mechanic has failed to get an induction coupling tight enough.  (I was =
the mechanic with the limp wrist on the clamp, once!)=20

One time I was at about 14 to 15,000 feet leaving Ada for Colorado.

The MP dropped to about ambient less an inch or so.  I landed at a small =
airport on a Sunday afternoon and re-positioned the induction coupling =
on the ramp and tightened it down and then continued the flight.

If it is JUST an induction coupling,  it is really no big deal.  But you =
never know.  My brother had one of these "unexplained loss of MP" events =
in our  C-320 in about 1981 or so.  Left engine caught fire and he =
bellied the airplane into a corn field.  Wife and two kids on board.  =
Good outcome.  Engine fell off the left wing when they jacked the =
airframe up!!!

Any time the induction couplings are disconnected,  it is really a good =
idea to make a return to service flight to 18,000 feet or so, and then =
re-tighten the couplings back on the ground before leaving home in =
anger.

Regards,  George


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of =
colyncase on earthlink
Sent: Saturday, July 09, 2005 4:33 PM
To: Lancair Mailing List
Subject: [LML] Re: Turbo Loss Consequences

George et al,

I don't think anyone has said yet what you actually end up with for=20
available MP
in the case of a hard turbo failure.
e.g. let's take the classic turbine wheel jams scenario, causing a =
pretty=20
good blockage
on that compressor.   You're now feeding the whole engine from the other =

turbo. Am I right
that you are now at NA power levels or less before you execute your =
safety=20
procedures?

Colyn


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