Part manufacturing can be broken in to two distinct disciplines:
1.) Parts used for aircraft and component repair
2.) Parts fabricated for resale
Operators and MRO’s are currently allowed to fabricate and install repair parts in accordance with AC43-18 guidelines. For primary structural parts, DER approval is required for part number specific repair parts. Once approved by the DER, the operator or MRO has the authority to fabricate and utilize the repair parts on an unlimited basis.
If parts are fabricated purely for the purpose of resale, the FAA requires PMA approval. Whereas a DER can provide recommended approval, the FAA must issue ultimate acceptance/approval. This is based on the additional requirements which the FAA imposes in regard to part inspection procedures, applicable repair manuals and inspection/acceptance of the 145 repair station fabricating the parts. STSES possesses several DER’s with PMA experience in various engineering disciplines.