MIL-HDBK-1783B, DEPARTMENT OF DEFENSE HANDBOOK ENGINE STRUCTURAL INTEGRITY PROGRAM (ENSIP).The purpose of this handbook is to establish structural performance, design development, and verification guidance to ensure structural integrity for engine systems. The guidance contained herein includes the experience and lessons learned achieved during development of U.S. Air Force engine systems since the mid-1940s. Recent experience indicates superior structural safety and durability, including minimum structural maintenance, can be achieved on an engine system if the guidance contained herein is included and successfully executed during system development. This handbook is intended for use in conjunction with JSSG-2007, Aircraft Turbine Engines, on engine development programs or by itself when used for commercial (off-the-shelf) acquisitions.