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what is the pridedure of reverse engineering for manufacturing aviation engine parts?
4 Comments
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#1 by B R on April 18th, 2011
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Engineers take the item they wish to build and do exactly as it sounds, they take it apart, study it, determine how all the parts work together and then rebuild it. When they are done they have built diagrams and schematics so they can repeat the process from scratch.
#2 by pecker_head_bill on April 18th, 2011
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if you are seeking PMA approval from the FAA for the manufacture of these parts you need first to go to the FAA regulations governing PMA application.
OEM manufacturers also deal with the FAA, but you will not get any engineering data about their products from the FAA as it is considered proprietary in nature.
PMA is granted on the bases of test and computation where by you must reverse engineer the part creating your own drawings and specifications, manufacture a test sample then test your part back to back with the OEM part proving it to be as good or better fit, form and function. this will require a full test report and first piece inspection subbmitted to the FAA engineering department for their approval.
Your eligibility list for this part will have to be proved to the FAA by documentation of the part number that the OEM assigned as it may be referenced in maintenance manuals and such. Your part will have it’s own unique part number to referance as a replacment for the original.
manufacturing of this item must be done in the U.S. to allow continuous monitoring by the FAA and your manufacturing and quality inspection system must be approved by the FAA as well.
The FAA is your customer, as such all product that you make for the flying public will be traceable and the FAA will enforce all governing rules and regulations pertaining to the distribution, use and sale of your products. You will maintain records and stand audits as deemed nessecary by the FAA.
On the specifics of reverse engineering, a good engineer should be very well versed in this. some of the fine points.
material composition such as alloy done by metallurgical tests.
tolerance and dimensional criteria by inspection CMM inspection works good along with other acceptable methods.
weight by a calibrated scale.
performance and strength by test and computation by acceptable methods and practices.
#3 by ASoxFan on April 18th, 2011
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Watch the movie: Paycheck, I think it’s called.
#4 by Jerry L on April 18th, 2011
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If you aren’t going to do it in accordance with the laws of your particular country, don’t even bother. Contact your local NAA for the laws, in the US that is the FAA and the rules are in 14 CFR 21. The number of illegal parts manufacturers and illegal unapproved parts placed on aircraft is a serious danger to the safety of the flying public and everyone on the ground under them. In the US, it will be the FBI who comes to visit you and you will definately go to jail.