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A Parts Manufacturer Approval (PMA) is used for modifications or replacement engine parts that are intended to be installed on a previously type approved engine model. An engine PMA is an approval of an engine part that is a proven equivalent part to the original type approved part, and is an authorization to produce that part for sale.

Regulatory requirements for an Engine PMA

  • Procedural Regulation: 21.303 of 14 CFR part 21
  • Airworthiness Regulation: 14 CFR part 33 (CAR 13 for older engines)

Procedural requirements for an engine PMA approval

  • Order 8110.42, Parts Manufacturer Approval Procedures (7/4/1995)

Engine product PMA approval policies

Updated: 1:07 pm ET May 8, 2008