From: Bill CSent: Tuesday, March 09, 2010 8:08 PMSubject: Light-Sport Aircraft Yahoo group Re: Crash caused by oil filling??The prior owner had the engine rebuilt. The key to the problem was it was a 582 mounted inverted. When mounted inverted you need to remove a plug to vent and get the oil to fill more than just the fill tube. Otherwise an air bubble forms and keeps the oil out. 2 1/2 hours and the oil starved engine failed. Guy never flew this plane. Sold it to the new owner who then had the failure and a landing on a street substantially damaged the plane. Here is part of the FAA report:
Disassembly of the engine revealed the "destruction of the rotary valve disc drive gear due to insufficient lubrication." Approximately 2 fluid ounces of oil was drained from the rotary valve shaft "oil bath," when the shaft assembly was removed from the engine case.
Information obtained by the FAA inspector from the Rotax Installation Manual, and Rotax Service Center Technicians, substantiated that it is possible for the rotary valve shaft lubrication system externally mounted oil tank to contain a full quantity of oil, without the rotary valve shaft "oil bath" chamber within the engine case actually being full of oil. This can occur in Rotax 582 engines mounted on an airframe in the inverted position (spark plugs down), if the rotary valve shaft oil is added without removing a vent plug in the engine case to vent the system during oil servicing. If the vent plug is not removed, an "air bubble" can form in the rotary valve shaft "oil bath" chamber, preventing oil from filling the chamber. The oil tank will indicate full, but insufficient oil will have been introduced into the rotary valve shaft "oil bath" chamber.
The current owner and an airframe and power plant mechanic completed a condition inspection on March 25, 2009, and no oil had been added. The motor glider had flown 2 hours and 30 minutes since he purchased it.
The FAA inspector located the previous owner of the motor glider. The previous owner stated he did not remove the vent plug during oil installation after the engine had been overhauled.
Bill
--- In Sport_Aircraft@yahoogroups. , "Rick Pitcher" <lightflyer@com ...> wrote:
>
> Now that's a scarey though Bill, the plane crashed due to oil filling.
> What did the guy do wrong, and WHY?
> You say he just sold the plane a couple hours before, why did it crash THIS time but not before?
> Wierd...
>
> ----- Original Message -----
> From: Bill C
> To: Sport_Aircraft@yahoogroups. com
> Sent: Tuesday, March 09, 2010 4:10 PM
> Subject: Light-Sport Aircraft Yahoo group Re: Cruising speed
>
>
>
> Mark,
> The consensus standards require the manufacturer to certify that it's product meets the definition of a light Sport aircraft. The owner/pilot is responsible for maintaining the aircraft in a configuration that meets the rule. Can you go faster........sure. Light pilot, no baggage, minimal fuel, tailwind, well polished paint job etc. Are there air cops with radar guns checking? Haven't seen one yet. Could you get in trouble for modifying and flying a plane with a different prop, wheel pants, bigger engine?..... sure. Is it likely?..... ......not very (depending on where and how you fly) but, how's your luck? Crash and injure/kill someone and NTSB will/must check everything, especially an N numbered aircraft. Talked to a guy today who sold an airplane that crash landed 2 1/2 hours later. NTSB contacted him and determined that his method of filling the oil caused the engine out and contributed to the crash. Just my opinions, your mileage etc........
>
> Bill
>
> --- In Sport_Aircraft@yahoogroups. , "blueriverday" <blueriverday@com > wrote:
> >
> > Ok, what I was referring to are various aircraft which have been slowed down by modifications such that they will meet the performance limits for LSA. The Arion Lightning, Pipersport, and
> > Pulsar XP could all easily go much faster depending upon how you
> > set them up.
> >
> > So I guess what I'm trying to ask is...who and when does a plane get checked to assure that it's slow enough? And, should I accidently find myself clipping along at 140kts, would anyone make an issue out
> > of it?
> >
> > ---
> > Mark
> >
> > --- In Sport_Aircraft@yahoogroups. , "apollonorthamericacom " <apollonorthamerica @> wrote:
> > >
> > > 138 mph or 120 knots is a performance limit Vh set for LSA. This means at maximum continuous RPM listed for the engine you should not be able to go faster than 120 knots (138 mph).
> > > In light of that fact, your question is not making sense to me at least. By definition a LSA cannot "cruise effortlessly" at 120 knots. That's Vh.
> > > Abid
> > >
> > > --- In Sport_Aircraft@yahoogroups. , "blueriverday" <blueriverday@com > wrote:
> > > >
> > > > Hello.
> > > >
> > > > Is anyone here actually cruising at 138 mph with no effort, and, if
> > > > so, is there anything other than "obedience" which keeps you from pushing it just a teeny bit faster, say...140?
> > > >
> > > > thanks, Mark
> > > >
> > >
> >
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