Can I buy alternate parts if they appear in the component IPC or overhaul manual?
A20: Not unless the part is covered by a PMA or TSO approval. The interchange information contained in an IPC or Overhaul Manual is not considered by the FAA to be approved data. Just because the component manufacturer chooses to include optional information in their manual does not mean that it automatically conveys airworthiness. The burden of installation of such a part is on the installer. We strongly recommend that any FAA Repair Station purchasing and installing parts that are listed in their manuals as alternates be sure to check with their PMI (FAA Principle Maintenance Inspector) and obtain written authorization.
