What document is used to apply preservation for aircrafts without a preservation maintenance requirement card?

The document used to apply preservation for aircraft without a preservation maintenance requirement card is typically specified by established maintenance and preservation guidelines. In this context, NA 15-01-500 is the correct reference because it provides the necessary procedures and criteria for effective preservation of aircraft components and systems. This document is crucial in ensuring that proper preservation methods are employed, thereby protecting the aircraft from environmental factors and ensuring its readiness for future use.

Each document mentioned has its specific focus and applicability, which means that using the correct one is critical to maintain compliance with maintenance standards. NA 15-01-500 stands out as it specifically addresses preservation in the absence of more detailed requirements, making it the right choice for this task. Understanding these distinctions reinforces the importance of adhering to the correct documentation in aircraft maintenance practices.