TM 1-1520-240-10            1-1-1 CHAPTER  1 INTRODUCTION SECTION  I.  INTRODUCTION 1-1-1.  General. These instructions are for use by the operator. They ap- ply to CH-47D helicopters. 1-1-2.  WARNINGS,   CAUTIONS,   AND   NOTES   DE- FINED. Warnings, cautions, and notes are used to emphasize important and critical instructions and are used for the following conditions. WARNING An  operating  procedure,  practice,  etc., which if not correctly followed, could re- sult in personal injury or loss of life. CAUTION An  operating  procedure,  practice,  etc., which, if not strictly observed, could re- sult in damage to or destruction of equip- ment. NOTE An   operating   procedure,   condition,   etc., which it is essential to highlight. 1-1-3.  Helicopter Description. This  manual  contains  the  complete  operating  instruc- tions and procedures for the CH-47D helicopters. It is powered by two T55 L-712 or T55-GA-714A engines. The primary mission of the helicopter is troop and cargo transport. The observance of limitations, performance, and  weight  and  balance  data  provided  is  mandatory. Your  flying  experience  is  recognized,  therefore,  basic flight principles are not included. It is required that THIS MANUAL BE CARRIED IN THE HELICOPTER AT ALL TIMES. 1-1-4.  Introductory Material. The following paragraphs describe certain sections of this manual, referenced forms, manuals, and Army Re- gulations.  Also  included  is  the  procedure  to  follow  to report errors or to recommend changes. 1-1-5.  Appendix A, Reference. Appendix A is a listing of official publications cited within the manual applicable to and available to flight crews. 1-1-6.  Appendix B, Abbreviation. Appendix  B  is  a  list  of  the  abbreviations  used  in  this manual. 1-1-7.  Appendix C, Conditional Inspections. Appendix C is a listing of conditions which require a DA Form 2408-13-1 entry. 1-1-8.  Index. The index lists in alphabetical order, every titled para- graph, figure, and table contained in this manual. 1-1-9.  Army Aviation Safety Program. Reports  necessary  to  comply  with  the  Army  Aviation Safety program are prescribed in AR 385-40. 1-1-10.  Destruction of Army Material to Prevent En- emy Use. For information concerning destruction of Army material to prevent enemy use, refer to TM 750-244-1-5. 1-1-11.  Forms and Records. Army aviators flight record and aircraft maintenance re- cords which are to be used by crewmembers are pre- scribed in DA PAM 738-751 and TM 55-1500-342-23. 1-1-12.  Change Symbol Explanation. Changes, except as noted below, to the text and tables, including new material on added pages, are indicated by a vertical line. The vertical line is in the outer margin and extends close to the entire area of the material affected with  the  following  exception:  pages  with  emergency markings, which consist of black diagonal lines around three edges, may have the vertical line or change symbol placed along the inner margins. Symbols show current changes only. A miniature pointing hand symbol is used to denote a change to an illustration. However, a vertical line in the outer margin, rather than miniature pointing hands, is used when there have been extensive changes made to an illustration. Change symbols are not used to indicate changes in the following: a. Introductory material. b. Indexes and tabular data where the change can- not be identified. c. Blank space resulting from the deletion of text, an illustration, or table. d. Correction of minor inaccuracies, such as spell- ing, punctuation, relocation of material, ect., unless such correction changes the meaning of instructive informa- tion and procedures.