Among aircraft parts distributors, the debate between parts manufacturer approval (PMA) and original equipment manufacturer (OEM) parts can be confusing and controversial. To understand how both options work, it’s important to learn about their past and current standards.

In some ways, these two types of parts have more similarities than you might expect. The best option for your operational requirements will depend on the application, so you’ll want to consider the advantages each type of part can offer for your operations. In this post, we’ll explore the meaning of PMA and OEM parts and compare the two so you can make an informed decision about your options.

PMA and OEM parts have somewhat different backgrounds, but they’re subject to the same industry standards. These options have two key metrics to compare — the quality and price. As you consider OEM and PMA parts’ differences and similarities, you can identify the best fit for your specific applications.

1. Quality of Parts

To go out on the market, both PMA and OEM products must undergo rigorous testing and meet standards requirements. PMA companies must navigate the in-depth approval process to ensure full compliance and product quality. OEM parts, meanwhile, have been proven successful through their use in the original equipment. Within the industry, established quality gates stipulate the material and design qualities that a product must have to be sold for use in equipment.

In the aerospace industry, the FAA’s regulations ensure the quality of aftermarket parts remains consistent with the quality of OEM parts. As a result, the quality of the two is essentially the same. Often times the PMA’s are from the same supplier the OEM uses. Additionally, in some cases, PMA components may have a slightly higher quality because manufacturers can address and resolve functional issues in the OEM.

2. Price of Parts

In the past, OEMs were relied upon as the only option for the best quality of parts. As a consequence, OEMs had little competition and kept prices high. However, as aftermarket replacement parts became more common, OEMs eventually adjusted pricing for specific components.

Today, manufacturers can still complete PMA production for lower costs, leading to more cost-effective product offerings. PMA components don’t compromise on quality while being readily available at a lower price point than OEM parts.

When you’re making a decision on which option is best for your applications, you’ll want to consider the specific parts you need for your operations. Would a PMA adjustment be expedient for your equipment? Does your particular equipment look exactly the same, whether it’s a PMA or OEM part? Evaluate your priorities and the options available for your particular equipment.