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I was asked to tear down a plane that had crashed, and find the problem , the FAA and Rotax had inspected the plane and decided it was a pilot problem, the fuel bowls were empty and they were able to bypass all systems and start the motor , I found the FACET fuel pump that was inline to have failed and totally shut off the fuel, one person died because of the crash, DO NOT PUT A PUMP INLINE < PUT IT IN A BYPASS LOOP or leave it out you do not need a boost pump on most aircraft engines , also fly the plane no matter what happens ...BOB
Is there a diagram/drawing for a by pass loop for the 601/650
>>>GIL, first of all dont put ethanol in a 912 uls motor and thankfully they dont sell the crap in alaska ..BOB
Yeh I would rather not put ethanol in my 912 either but in some places that's all we can get unless it's avgas which isn't good either. The disadvantages to both can be minimized with proper handling...Blue Stabil in ethanol and don't let it sit very long or it'll probably go bad even with the stabil in it. And TCP(Decalin Runup) in avgas. Bout best some of us can do and it's being done every day. And after all even the 912 ULS is approved for ethanol.
Pick your poison.
Yeah, Rotax SI 912-016 authorizes 10% E fuels
Inquiring minds still want to know exactly what model facet pump failed, So far seems most of us are damned with the curse!
Chris, I believe the pump model #is 40105N, there is no Model #'s on the pumps, this # came off of the Pump Box. ...Bob
On Facet pumps the model number is typically on the bolt flange with two numbers to the left of the hole and 3 to the right
It is a 40105 n pump ..BOB
There is an app called PURE GAS which shows all ethanol free gas stations in the entire U.S. on a map.very useful.
As I pause and ponder if I will continue at all with my original plan to install the $42 facet pump I bought for my Rotax 912 equipped 701 I’m building, I’m contemplating installing it in a bypass loop, using it only to start the engine, switching it off for flight operations, and replacing it at each annual.
Just revisiting this issue as it really bothers me. Risk is based on probability and consequence of a failure. As an example, "engine explosion" would have very high consequences, but the probability is low enough that we still fly single engine planes.
In another forum, I asked an acquaintance, who's VERY knowledgeable about NTSB reports and investigations, if I could search for a given component manufacturer by name to see occurrences of FACET pump failures, in this specific case.
The report which resulted had only one Facet fuel pump related failure, in 2005 on an RV-6A. Other incidents that were thought to be fuel related, with Facet pumps, resulted in the pumps working normally on post-crash examination.
For the case in which you were assisting in the investigation, perhaps it was recent-enough that the report hadn't been finalized? Or, if the word "facet" was not used, that would have resulted in a false report as well.
Not doubting your work; I'm just trying to gain as much insight as possible. I don't want to slough it off, but don't want to over-design just the same. Thank You for any additional information you might be able to share....