Safe Life Items / Life Limited Parts / Back to Birth – Aircraft lease requirements and data sources.
An aircraft will contain many LLP Life Limited Parts which can also be known as Safe Life Items SLI parts; typically, these are in components such as the engines and landing gear, although these items may be present in the cabin also depending on your configuration.
An LLP/SLI part was designed to have a defined “life” and after this “life” is complete it will be destroyed regardless of condition.