This podcast questions the meaning and regulatory significance of the acronym “OEM” (Original Equipment Manufacturer) within civil aviation. Written by Sarah MacLeod, the piece argues that the term lacks formal legal or regulatory definition in civil aviation safety rules, where only design and production approval holders are recognised. It contends that the common use of “OEM” in the industry, often in conjunction with discussions about PMA (Parts Manufacturer Approval) parts, leads to misunderstanding and problematic communication. The podcast concludes that using “OEM” in civil aviation is generally misleading and dangerous unless the term is clearly defined within a contract.