Parts Manufacturer Approval (PMA) parts that do not have mandatory replacement times or specified procedures are not required to be marked with which information?

When discussing Parts Manufacturer Approval (PMA) parts, it's important to know that certain information must be marked on those parts to ensure proper identification and traceability. However, parts that do not have mandatory replacement times or specified procedures are not required to include the serial number in their markings.

The reason for this is that the serial number is primarily used for parts that require traceability, particularly for maintenance and tracking purposes. Since these specific PMA parts lack mandatory replacement intervals or mandated procedures, the necessity to mark them with a serial number is diminished. This means they can often be tracked without that specific level of detail, focusing instead on the PMA itself and any necessary identifiers for quality assurance.

In contrast, other markings, such as the letters "FAA PMA," the trademark, and the production certificate number, provide essential information about the approval status and ensure that the parts are recognized as compliant and safe for use. Therefore, the absence of a serial number in this context does not compromise safety or compliance, making its omission acceptable for certain PMA parts.