Parts Manufacturer Approval (PMA) is used for modifications or replacement propeller system parts that are intended to be installed on a previously type approved propeller model. A propeller PMA is an approval of a propeller system 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 a propeller PMA

• Procedural Regulation: 14 CFR part 21 Section 21.303
• Airworthiness Regulation: 14 CFR part 35

Propeller product PMA policy

• PMA Engineering Design Approval Basis - Identicality versus Test and Computation for Engine and Propeller Parts
• Parts Manufacturer Approval (PMA) for Critical Propeller Parts