Getting back to the issue of mil-std. specs, Obviousman. Looking back at your original reply question....

To what airworthiness standard did the 757 have to comply for the issuence of its Type Certificate?

I assume you are referring to FAR Part 25 airworthiness standards for transport category airplanes. That isn't relevant to my point, however, which was about parts traceability for these aircraft.

I was actually thinking of Mil-Std 130, which applies to parts traceability for military aircraft and equipment. So while 757's are not built to mil-std. specs, that is a standard used for parts traceability. And it also proves that there is much more to mil-spec. than jt-3d said....

That's cute. Do you even know what that means? MilSpec numbers are used to identify campatility between different types of grease in the aviation biz. They also are used for O-rings and adhesives but that's about it.

Very cute indeed, jt-3d.

Since I'm referring specifically to parts traceability within the manufacturing sector, it's related to the Quality Systems under which they must be regulated and in compliance with. For commercial aircraft, that would be programs such as ISO 9000/9001 and AS9000/9100.

The relevant point I was making was that 757's are indeed able to be traced through individual part identification back to the parent aircraft.