e. Section 21.137, Quality system (§§ 21.307 and 21.607).
(1) The new rule standardizes the quality system requirements for all PAHs. Specifically, the new part 21 rule requires that the quality system be described in writing and include elements as specified in § 21.137(a) through
. (Previously, the quality system requirements for holders of or applicants for PMAs were different from quality system requirements for holders of or applicants for PCs and TSO authorizations.) These requirements are incorporated in subparts K and O, §§ 21.307 and 21.607 respectively, by reference.
(2) These amendments require the PAH to develop a quality system or modify its current system consistent with the size of the PAH and the complexity of the product or article produced, as is the practice today. For example, the FAA would expect a large aircraft manufacturer to have a well developed, complex quality system. In contrast, a small parts manufacturer producing a non-complex article could have a less complex quality system. However, that system is still required to comply with FAA quality system regulations and reflect the needs of the PAH. These amended quality system requirements are now consistent with requirements of other aviation authorities as well as industry best practices.