Today's Message Index:
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1. 08:24 AM - Re: 912ULS prop strike (Roger Lee)
2. 05:32 PM - Re: 912ULS prop strike (JohnF)
3. 06:17 PM - Re: 912ULS prop strike (Roger Lee)
4. 06:40 PM - Re: Re: 912ULS prop strike (John Fasching)
Message 1
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| Subject: | Re: 912ULS prop strike |
Howdy John,
Really sorry to hear about your incident. If it is any consolation at all just
think you weren't the first and you won't be the last. It has happened to thousands
and will happen again. I had, many years ago, my own little mishap and bent
a gear leg on a tail dragger. It is definitely a live and learn world.
So with that said onward.
Was the prop at idle when it hit or WOT? If you get right on it you may be down
for 2 weeks.
You need the Rotax Heavy maint. manual and it tells you how to do this. It isn't
real hard. More time consuming. Here it is in a nutshell.
You need to do a runout check on the prop flange. Pull the prop and you will need
to put a dial indicator on the prop flange and check for run out. Then you
do need to pull the gearbox and do the inspection listed in the maint. manual
on the gearbox. You will be better off sending this in to a Rotax center, like
CPS or one of the others. When the gearbox is off you need to do another runout
check on the crank shaft with the small gear on it. Again you will need a dial
caliper set up to check this. If the crank isn't bent and just to put your
mind at ease most aren't then you just have the gearbox tear down and inspection.
You might as well replace the Bellville washers in the gearbox since you
have it off. They, plus the shims, are responsible for the amount of friction
torque that you test during 100 hr or annual inspections. They will have to remove
the gearbox shaft bearing and check the shaft runout. They will have to replace
the bearing. This process may be around $500-$600, but when you get your
gearbox back it will be good as new.
p.s.
How many hours on the engine?
Call Jeremy at CPS 510-357-2403. He can give you a good handle on pricing and times.
I hope this helped some.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=302472#302472
Message 2
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| Subject: | Re: 912ULS prop strike |
Time on the engine was zero...brand new unit, run perhaps one half hour doing carb
balancing, and general checking. The prop hit at full power.
Thanks for the information.
JohnF
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=302529#302529
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| Subject: | Re: 912ULS prop strike |
Hi John,
Was it just the tips of the prop or all the way down to the hub? What type of prop
was it?
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=302535#302535
Message 4
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| Subject: | Re: 912ULS prop strike |
Sensenich ground adjustable hollow composite. One blade broke off right at
the spinner, and the other one broke off about 10-inches away from the
spinner. Some folks searched the accident area...grass along the taxi and
runway but found nothing.....either the prop broke into bits or was thrown a
long way away, which is what I think.
Spinner completely undamaged..not a scratch. Clamping pieces and a
cone-shape 'cup' that limits blade rotation when settin the angle were all
OK.
No external physical damage to any engine component..even the gascolator
located at the bottom of the firewall escaped injury..lower cowl is trash as
is the nose gear, leg fork to the nose wheel, and the gear leg that broke
where it was welded to a piece that allowed bolting it to the underside of
the fuselage.
Prop replacement is simply a bolting exercise and a dent in the check book.
John
----- Original Message -----
From: "Roger Lee" <ssadiver1@yahoo.com>
Sent: Friday, June 25, 2010 7:16 PM
Subject: RotaxEngines-List: Re: 912ULS prop strike
>
> Hi John,
>
> Was it just the tips of the prop or all the way down to the hub? What type
> of prop was it?
>
> --------
> Roger Lee
> Tucson, Az.
> Light Sport Repairman - Maintenance Rated
> Rotax Repair Center
> 520-574-1080
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=302535#302535
>
>
>
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