Engine and Powerplant DER Services

Prime Propulsion is your go-to partner for piston and turbine engine PMA DER consulting and powerplant repair DER liaison services. We aim to deliver airtight compliance matrices to accelerate every approval milestone. Whether you’re developing a new PMA for fuel nozzles, or accessory gearbox parts—or seeking major repair or repair specifications—our in-house DER brings insider FAA experience to minimize comments and cut review cycles by up to 40%. From identicality PMA and material life-cycle testing through DER-witnessed first-article inspections and follow-on support, we manage every technical and regulatory step so you can focus on engineering innovation and production ramp-up. Choose Prime Propulsion for specialized engine and powerplant DER consulting that transforms complex FAA requirements into streamlined, service-ready solutions.

PMA & Major Repair, and repair specifications approvals for turbine engines, auxiliary power units, accessories, piston engines, fuel systems, etc.
DER-authored Test & Computations, test plans, and hand calculations per AC 21-303 App. A
First-Article Inspection and NACIP support for proposed PMA Articles
On-site client support for test witnessing
DER-led identicality studies for legacy and derivative engine parts
Material compatibility and life-cycle testing plans (creep, fatigue, corrosion)
Locate and contract required laboratories as needed to perform testing
Powerplant and Engine ATC, STC, and TC support.
Post-approval troubleshooting and support
DER-led SOP and PMA-pathway workshops for in-house teams

Turbine fuel nozzle - PMA in 10 months, 20% cost savings
Viton O-rings - PMA in 5 months, 60% cost savings
Accessory bearing - PMA in 7 months, 30% cost savings
Aircraft fuel pump shaft - PMA in 8 months, 25% cost savings
Accessory repair - Prevented scrapping of 40% of components by installing sleeve.

Built on our DER’s pre-submission “dry runs,” our clients routinely see FAA acceptance in 30–40% less time compared to industry averages—getting your parts into service (and revenue) sooner.
Exclusive engine/APU expertise versus generalist consultancies
One-stop engine/powerplant portfolio management from design through field return.
Averaging over 25 Powerplant and engine component PMAs per year, including many submissions with zero comments.
Flat-fee scoping and modular service bundles—choose exactly the deliverables you need (e.g., Review Only, Package assembly, or full-package with drawings and lab reports)—so you avoid surprise overages.
FAA Powerplant Engineer, extensive experience reviewing PMAs from the lenses of the FAA.