M20C wing replacement question

[cliffy]

No the part to be legally installed has to be able to be traced as sourced from a particular airplane as noted

in the log book after installation. 

[jetdriven]

are you sure?

 

[47U]

56 minutes ago, jetdriven said:

are you sure?

 

I agree with jetdriven.  

In a perfect world, yes, the history of every used part could be traced back to its original production certificate at the OEM.   But in the used parts market, that’s not realistic, nor necessary for most parts.  Serially controlled items will inherit more scrutiny and (hopefully) history.  But, for the majority of used parts, in that market there is an integrity factor to be considered.  Is the Reaper or Loewen Mooney Salvage going to sell me a bogus part?  I don’t think so.  Buying something off eBay?  Better be extra (EXTRA) vigilant.

Bottom line, the installing A&P has to evaluate the part for conformance and serviceability to determine airworthiness.  It’s their signature that establishes legality.  

That’s how I see it.

[cliffy]

https://www.faa.gov/documentlibrary/media/advisory_circular/ac 20-62e.pdf

In my reading of 7  I dentification of Replacement Parts    - 2 Used Parts Identification   I read that trackability is needed 

[EricJ]

5 hours ago, cliffy said:

https://www.faa.gov/documentlibrary/media/advisory_circular/ac 20-62e.pdf

In my reading of 7  I dentification of Replacement Parts    - 2 Used Parts Identification   I read that trackability is needed 

You can cherry-pick the text to interpret it that way, but by observing the common practices of the industry it appears that few others share that interpretation.  FWIW, 7.b.2  (the only section with a part 2) is regarding Foreign Manufactured Replacement Parts.

You can also read 7.g and reasonably parse it like this:

g. Maintenance Release Document. A release, signed by an appropriately certificated person, qualified for the relevant function that signifies that the item has been returned to service after maintenance or test function has been completed. This type of documentation could be in the form of a repair station tag containing adequate information (§ 43.9); work order, FAA Form 337, Major Repair and/or Major Alteration; FAA Form 8130-3; or a maintenance record entry, which must include an appropriate description of the maintenance work performed, including the recording requirements of § 43.9 and part 43 appendix B.

This has been my understanding, that the installer just needs to determine that the part is airworthy (e.g., functional and safe for installation) and make an appropriate 43.9 entry in the logbook, which should be done, anyway.   The history or source of the part does not need to be determined.   Used parts get installed in airplanes all the time without knowing what airplane it came from.   And the usual caveat that AC 20-62 is advisory and not regulatory applies as well.