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The CAA is becoming increasingly concerned about the authenticity and serviceability of aircraft parts especially the quantity and variety of unapproved parts which are finding their way on to registered aircraft. Evidence indicates that these counterfeit and/or fraudulently identified parts are being imported, largely from North America; however, the CAA also has evidence of such bogus parts originating from other foreign sources.
Manufacturing and/or marketing bogus parts is not new but there has been recent evidence of the falsification of release documentation (BCAA Form One or equivalent).
Installing bogus parts onto aircraft has serious airworthiness implications; to illustrate just how serious, the following two examples are quoted involving aircraft which are available in the international market place:
(a) A helicopter main rotor blade complete with release documentation was traced as having been scrapped by the manufacturer during the manufacturing process.
(b) An engine mount described as fitted new to an aircraft in 1979 was traced as having been factory installed in 1966.
The need to ensure that parts installed on an aircraft meet the design specification and are serviceable is self-evident. The installation of any part failing to meet the intended design requirements degrades those requirements, leading to a degradation of airworthiness.
1.2 Objective
It is essential that for the purposes of continuing airworthiness a system of control exists which ensures that only parts meeting the approved design data applicable to a particular aircraft are installed on that aircraft. This CAP provides guidance on the establishment of such a system.
1.3 References
(a) ANTR Part 21, Subpart K (Parts & Appliances) for approved parts
(b) FAA Advisory Circular 21-29B for Suspected Unapproved Parts Programme
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