1-4. WHO NEEDS A PMA?
a. General Requirements. Title 14 CFR § 21.303(a) requires any person producing replacement or modification parts for sale for installation on a type-certificated product to PMA. Also PMA may approve the production of parts from a supplemental type certificate (STC). PMA applies to most replacement and modification parts. Only use an STC for the approval of parts that constitute a major change to the product. See FAA Order 8110.4, Type Certification, for STC procedures. b. Getting a PMA for Technical Standard Order (TSO) Articles. We at the FAA may issue a PMA for replacement parts for articles produced under a TSO authorization when these articles are in the product’s type design. Then the replacement part is for the eligible product not the article. The installation of a PMA part may result in a minor design change TSO article yet meet the product’s airworthiness requirements. We may require the installer this part to place a modifier’s nameplate on the article. See FAA Order 8150.1, Technical Standard Order Program, for more details. Replacement parts approved under the basis of identicality do not change the article’s design and do not require a modifier’s nameplate. Full text: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgOrders.nsf/0/d134929f93b3334e8625708100582c1b/$FILE/Order%208110-42B.pdf Even if the ADI is STCd, They must have a PMA to manufacture it for certified aircraft. We are stumbling over words. The ADI is not approved for use in certified aircraft as their website states, but if Eli can come up with a 337 it could be used as a basis under the "Obrien Report". Bill CC: [EMAIL PROTECTED]: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Fri, 9 May 2008 11:42:18 -0400Subject: Re: [ercoupe-tech] Re:Trutrak ADI Attitude indicator installation Not quite. A parts manufacturer approval part (PMA) is identical to an individual TC part in every way, so it is considered a direct replacement part for OEM parts. For example, if you change a Piper PA-23-250 nose gear actuator with a PMA nose gear actuator, that action only requires a logbook entry under section 43.9. On the other hand, a Technical Standard Authorization (TSO) part is a generic part, like tires, communication and navigation equipment, seat belts, instruments, etc., that could be used on many different makes and models of aircraft. In many cases, installing a TSO part “may” require a Form 337 because installing it would be considered a major alteration of the original type design. For example, installing a new TSO glass cockpit in a Cessna 172 would require a Form 337. *************************************************************************** On May 9, 2008, at 11:18 AM, WILLIAM BIGGS wrote: Actually the issue here is not TSO but PMA (Parts Manufacturer Approval) Trutrac does not have PMA to manufacture certified instruments. here is a related story http://www.aeroelectric.com/Reference_Docs/FAA/Alaskan_L-40_Fiasco/ be sure to read the "obrien report" linked to at bottom of that page. Bill To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Fri, 9 May 2008 10:56:20 -0400Subject: Re: [ercoupe-tech] Re:Trutrak ADI Attitude indicator installation Pretty safe bet that since you are attempting to install non-TSO'd equipment in a certificated aircraft these days you will not receive a field approval. Absent such approval the installation is illegal. On May 9, 2008, at 10:39 AM, fnelson913 wrote: The way that I understand this issue, I would say that field approval is NOT required since this type of equipment is not required to be TSO approved. Therefore, you need no special authorization to add this equipment to your panel. Am I missing something.Frank NelsonN51DV - 415C--- In [email protected], [EMAIL PROTECTED] wrote:>> The general, safe and undisputable answer to that question is YES , you> can, if you get a field approval from your local FSDO. Perhaps somebody> knows regulation technicalities or loopholes that allow it to be legally> installed without a field approval, and if so, we would like to know!! I> am all for that.> Eliacim> > Make Windows Vista more reliable and secure with Windows Vista Service Pack 1. Learn more. _________________________________________________________________ Make Windows Vista more reliable and secure with Windows Vista Service Pack 1. http://www.windowsvista.com/SP1?WT.mc_id=hotmailvistasp1banner
