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On Tue, 06 Nov 2007 03:43:50 GMT, "Cy Galley"
wrote: My question is Why oh Why didn't you check the carb screws before to put in on your plane? You can't. The screws have bend up tabs that are bent up to keep the hex head screws from backing out. The only way you would know the case was loose would be if it were so loose you could see the gap in the seam, or bend the tabs down and then tighten the screws, and then bend the tabs back up. But who would think that would be necessary with a newly rebuilt carb shipped from the manufacturer? I think they did tighten the screws, but the threads were worn out inside the carb body, the screw threads slipped. Wasn't my fault! It was carb manufacturers for shipping such a sloppy piece of crap. |
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Oh, come on. If the manufacturer did really "tighten" the bolts, then they
would have had to "slip" an entire thread on every pitch. Fixed threads don't "slip" if they are worn, they jump threads. If the carb body was this worn, the "tightening" would have completely stripped every pitch and they wouldn't have been able to torque the bolts down. BTW, a screw has a slot, a cross, or a keyway. A bolt has a hex head. Me? I use the hex bolts but I replace them with drilled head bolts and use both the bendmeup tabs and safety wire as well. There is nothing in the manual that says you can't ADD safety, you just can't do less. Jim -- "If you think you can, or think you can't, you're right." --Henry Ford "four-oh-four" wrote in message ... On Tue, 06 Nov 2007 03:43:50 GMT, "Cy Galley" wrote: My question is Why oh Why didn't you check the carb screws before to put in on your plane? You can't. The screws have bend up tabs that are bent up to keep the hex head screws from backing out. The only way you would know the case was loose would be if it were so loose you could see the gap in the seam, or bend the tabs down and then tighten the screws, and then bend the tabs back up. But who would think that would be necessary with a newly rebuilt carb shipped from the manufacturer? I think they did tighten the screws, but the threads were worn out inside the carb body, the screw threads slipped. Wasn't my fault! It was carb manufacturers for shipping such a sloppy piece of crap. |
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On Tue, 6 Nov 2007 08:01:07 -0800, "RST Engineering"
wrote: Oh, come on. If the manufacturer did really "tighten" the bolts, then they would have had to "slip" an entire thread on every pitch. Fixed threads don't "slip" if they are worn, they jump threads. If the carb body was this worn, the "tightening" would have completely stripped every pitch and they wouldn't have been able to torque the bolts down. BTW, a screw has a slot, a cross, or a keyway. A bolt has a hex head. Me? I use the hex bolts but I replace them with drilled head bolts and use both the bendmeup tabs and safety wire as well. There is nothing in the manual that says you can't ADD safety, you just can't do less. Jim If the threads didn't slip, then they were never torqued correctly. And the bolts were the type that had hex heads, and also a phillips slot for a screw driver. Not sure how to label those. And who receives a new carb from the manufacturer and disconnects all saftey wire/tabs to check for tightness of all screws/bolts? virtually no one you idiot! To suggest such a procedure is ridiculous. But there are always those who will defend the manufacturer and blame the pilot/mechanic regardless. You seem to fit nicely into that catagory. I'm the one who flew the plane home with a leaking, brand new carb, not you mister know-it-all. |
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RST Engineering wrote:
Oh, come on. If the manufacturer did really "tighten" the bolts, then they would have had to "slip" an entire thread on every pitch. Fixed threads don't "slip" if they are worn, they jump threads. If the carb body was this worn, the "tightening" would have completely stripped every pitch and they wouldn't have been able to torque the bolts down. BTW, a screw has a slot, a cross, or a keyway. A bolt has a hex head. Me? I use the hex bolts but I replace them with drilled head bolts and use both the bendmeup tabs and safety wire as well. There is nothing in the manual that says you can't ADD safety, you just can't do less. Jim Damn, I got ripped off, my machine supply house just sold me a couple pounds of 1/2" SAE hex head cap screws. Must be some kind of government conspiracy though, as I also have a bucket of AN21 "Bolts" out here in the shop that obviously aren't bolts no matter what the AN spec calls them. What else have I been lied to about? Looking in the bin under my bench now...Oh my god, I really am screwed now -- I have bins full of NAS stuff, all labeled "bolts" that can't possibly be bolts. At least my Torx screws are authentic. Charles |
#6
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![]() Instead ofdiscussing lawyers, liability and the big problems with our countries liability issue, I'm more interested in the basics. Such as, do other manufacturers make STC'd parts for the Precision/facet/Marvel dribbler carbs? Such as Kelly? Or did they buy the parts from Precision and then overhaul carbs using those? If stc'd parts are made elsewhere, then we should be okay keeping the current crop of carbs flying. Precision didn't mention if they would continue to sell carbs to the homebuilt/experimental market. But I suspect they won't. Not sure about their Silverhawk add-on fuel injection system. Be interesting to see if they continue to maket the non-certified stuff. I've had mixed results from Precision. I flew to Lakeland a few years ago in my homebuilt with a Marvel carb on my lyc. 160. My carb had a problem, and I bought a rebuilt one directly from Precision, having it shipped overnight to my hotel. I installed it in the emergency repair area, then flew back home with it. Had mixture problems all the way home. Once I got there, I found the case half bolts were loose, never tightened correctly. And the carb was leaking fuel along the seam. I was pretty angry they'd send me something that messed up, so I raised hell with them, and they shipped me a brand new one. I found out later, they farm out the overhaul to a foriegn country. So goes the crappy job. Plus the first carb they sent me looked ancient, an old Marvel one, and I suspect the internal threads were worn out. That being the reason it worked loose. At least I got a new one out of them before they stopped production. I think they brought on some of their problems themselves. But I don't know of anyone that manufactures the carb body, and that can wear out. So if someone has an old carb body that has worn out threads. or is cracked, they'll be looking for a used carb somewhere else. RAM On Sat, 03 Nov 2007 05:58:50 GMT, Jerry Springer wrote: Peter Nielson Product Support Mgr. Precision Airmotive LLC 14800 40th Ave NE Marysville, WA 98271 360-651-8282 Subject: Letter to Industry Here is the text of a letter we are sending out to the industry today. Precision Airmotive LLC has discontinued sales of all float carburetors and component parts as of November 1, 2007. This unfortunate situation is a result of our inability to obtain products liability insurance for the product line. Precision Airmotive LLC and its 43 employees currently manufacture and support the float carburetors used in nearly all carbureted general aviation aircraft flying today. Precision has been the manufacturer of these carburetors since 1990. These FAA-approved carburetors were designed as early as the 1930's and continue to fly over a million flight hours a year. After decades of service, the reliability of these carburetors speaks for itself. Nonetheless, Precision has seen its liability insurance premiums rise dramatically, to the point that the premium now exceeds the total sales dollars for this entire product line. In the past, we have absorbed that cost, with the hope that the aviation industry as a whole would be able to help address this issue faced by Precision Airmotive, as well as many other small aviation companies. Our efforts have been unsuccessful. This year, despite the decades of reliable service and despite the design approval by the FAA, Precision Airmotive has been unable to obtain products liability insurance for the carburetor product line. While we firmly believe that the product is safe, as does the FAA, and well supported by dedicated people both at Precision and at our independent product support centers, unfortunately the litigation costs for defending the carburetor in court are unsustainable for a small business such as Precision. Therefore, as of November 1, 2007, Precision Airmotive LLC has been left with no choice but to cease production and support of its float carburetor product line. We are working with the engine manufacturers and others in the industry in an attempt to minimize the impact on general aviation and to provide future support for this product line. There is a substantial quantity of parts and carburetors stocked at our distributors which should be sufficient to support the industry for a short time. |
#7
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You can do more. It is important that you contact your congressman
today - www.AeroBlue.Org/TortReform Describe the damage that these suits have on our industry. This action will affect 152,000 $15B worth of aircraft. We need to extend the General Aviation Revitalization Act to protect certified manufacturers, parts and service. There are increasing numbers of mechanics who will not, can not repair aircraft over 18 years old, because this liability has shifted to the mechanic and the part. AeroBlue.Org - The Grassroots Aviation Network |
#8
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I wrote Precision the following letter, and got back a reply.
I would like to know if your company will still manufacture the SilverHawk fuel injection systems? And what about carburetors for experimental aircraft, are they to be discontinued also? And companies like Kelly, that rebuild your carbs, will they be able to do so, or was Precision the only source of approved parts for the float carburetors? Are there other companies that manufacture STC'd parts for your carbs? Their reply, We are continuing to sell all of our fuel injection products. We are not able to supply any carburetors or components for any purpose. Precision has no affiliation with Kelly or any other aftermarket PMA carburetor parts manufacturers. From what they said, it seems manufacturers like Kelly Aerospace do indeed manufacture parts for the carbs, so about the only thing that won't be available are the actual carb bodies. And there should be enough of those around to last the G/A fleet for a long time. I suspect parts prices will go up though. The key words in their reply was "other aftermarket PMA" which means other companies can manufactures replacement parts. That fact should keep us flying. |
#9
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Nothing will be done.
Check what group is the largest contributor to campaigns. Trial lawyers. nuf said. |
#10
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