The theme of this book is that 21st Century Technology aircraft (NEXGEN) has out paced the data and knowledge for aging aircraft programs today. Persons involved with NEXGEN aircraft have minimum historical data and knowledge to base maintenance practices on to ensure airworthiness. The economy of the industry for the last twenty years has resulted in reducing maintenance training to diminish maintenance costs and by using contract onshore and offshore facilities for maintenance and inspection. This mixture of maintenance actions has left the industry vulnerable to sub-grade maintenance...