CAR 101.01] Flight critical parts Flight critical parts are usually regulated by the FAA and the European Union. These include, navigation systems, communication systems, traffic collision avoidance system (TCAS), etc. Repairable parts Some high value aircraft parts can be repaired using various re-manufacturing processes such as machining, welding, plating, etc. The techniques described in Advisory Circular 43.13-1B are generally used as guidance for repair processes that are not specifically described by the manufacturer. Used Low jet fuel prices and new programs delays lead to keeping airliners in service for longer, relying increasingly on used parts: their market will grow from $4.5 billion in 2016 to $7.7 billion in 2026. Demand for aircraft recycling is thus growing with 9,300 retirements in the decade including 4,000 narrowbodies. The most prized are life limited parts from CFM56s and less from IAE V2500s. Suspected unapproved parts Suspected unapproved parts are those aeronautical parts that should be deemed unairworthy and are therefore not eligible for installation on an aircraft or another aeronautical product because their design, manufacture or distribution is in conflict with aviation regulations. This means that such a part may not have an approved design, may be manufactured by an unapproved manufacturer, distributed by an unapproved distributor, possibly even taken from scrap aircraft while bypassing mandatory and costly shop inspection and recertification processes. Indicators for an unapproved or bogus part may reach from missing, incomplete or counterfeit certification, missing or manipulated identification plates, physical aspects like surface grain structure, shape, colour, or weight deviating from the removal part, to any indicators of poor workmanship as well as a suspiciously low purchase price. Suspected unapproved parts shall be reported to the national aviation authority. Trade Associations Representing the Aircraft Parts Industry Aircraft parts are produced by manufacturers. FAA approved aircraft and aircraft parts manufacturers are represented by the Aerospace Industries Association (commercial aircraft manufacturers), General Aviation Manufacturers Association (general aviation aircraft manufacturers) and Modification and Replacement Parts Association (MARPA) (aircraft parts manufacturers). The Aeronautical Repair Station Association (ARSA) represents organizations which repair aircraft and parts thereof. Some aircraft parts are sold by distributors. Distributors of aircraft parts are represented by the Aviation Suppliers Association. References 14 C.F.R. 21.303; Federal Aviation Regulation (14 CFR) Part 21 14 C.F.R. 21.9; Federal Aviation Regulation (14 CFR) Part 21