The effectiveness of Engine Life Usage Monitoring and Parts Management systems is largely determined by the aircraft-specific requirements. This AIR addresses the following areas:

1. a Safety.
2. b Life-limiting criteria.
3. c Life usage algorithm development.
4. d Data acquisition and management.
5. e Parts life tracking.
6. f Design feedback.
7. g Cost effectiveness.

This AIR primarily examines the requirements and techniques currently in use, including:

1. a Parts classification and control requirements.
2. b Failure causes of life-limited parts.
3. c Engine life prediction and usage measurement techniques.
4. d Method validation.
5. e Parts life usage data management.
6. f Lessons learned.
7. g Life usage tracking benefits.