How so? As an A&P there nothing that stops you from installing those cheap high quality parts on a TC aircraft as an alteration. Regardless the PMA, TSO, or STC systems are not just a domestic FAA policy either, but are how the US meets the requirements of various aviation international agreements/treaties they are signatories on. It the same system that prevents the TCCA owner-maintained aircraft from leaving Canada as they no longer meet several of the aviation bilateral agreements they’ve signed and do not meet international airworthiness standards.but the FAA then creates the PMA to put up a legal roadblock to cheap high quality parts.
Curious. If the repair scheme is “copy/pasted from the 43.13-1B” why can’t an APIA use the same AC43.13 repair vs buy the kit and comply with the AD via an AMOC?Look at a 337 for a Major repair. You can get the FAA's blessing to repair a wing, but not sell a wing repair kit. Piper owners are feeling this now with the spar AD. There is nothing special about the repair, but Piper uses the FAA to for an overpriced kit that's basically copy/pasted from the 43.13-1B