TM 1-1520-238-10 Change 1 Index 3 Subject Page No. Subject Page No. Anti-Ice Control Panels, Pilot and CPG (figure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60 Anti-Ice Operation, Engine and Engine Inlet 2-24 Anti-Ice System, Engine and Engine Inlet . . 2-24 Anti-Ice, Engine Inlet and Nose Gearbox . . 2-61 Anti-Ice/De-Ice, Pitot Tube and Air Data Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60 Anti-Ice/De-Ice, PNVS and TADS . . . . . . . . . 2-61 Anti-Ice/De-Ice, Windshield . . . . . . . . . . . . . . 2-60 Anti-Icing and De-Icing . . . . . . . . . . . . . . . . . . 2-60 Anticollision Lights . . . . . . . . . . . . . . . . . . . . . . 2-74 Appendix A, References, Description . . . . . 1-1 Appendix B, Abbreviations and Terms, Description . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Approved Fuels (table) . . . . . . . . . . . . . . . . . . 2-93 Approved Oils (table) . . . . . . . . . . . . . . . . . . . 2-95 APU (Auxiliary Power Unit), General . . . . . . 2-72 APU and Engine Fire Extinguishing System 2-19 APU Compartment Fire . . . . . . . . . . . . . . . . . 9-12 APU Control Panel . . . . . . . . . . . . . . . . . . . . . 2-72 APU Control Panel (figure) . . . . . . . . . . . . . . 2-73 APU Controller . . . . . . . . . . . . . . . . . . . . . . . . . 2-72 APU Electrical System . . . . . . . . . . . . . . . . . . 2-72 APU FIRE PULL Handle Illumination in Flight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 APU Fuel Supply . . . . . . . . . . . . . . . . . . . . . . . 2-40 APU Fuel System . . . . . . . . . . . . . . . . . . . . . . 2-72 APU Lubrication System . . . . . . . . . . . . . . . . 2-72 APU Operational Limits . . . . . . . . . . . . . . . . . 5-9 Area Weapon System, 30mm . . . . . . . . . . . . 4-10 Area Weapon System, 30mm (figure) . . . . . 4-11 Arm, (Weight and Balance Definition) . . . . . 6-3 Armament Configurations, Authorized . . . . . 4-10 Armament Control Panels, CPG . . . . . . . . . . 4-29 Armament Control Panels, Pilot . . . . . . . . . . 4-24 Armament Inflight Procedures . . . . . . . . . . . . 4-66 Armament Postflight Procedures . . . . . . . . . 4-68 Armament Preflight Procedures . . . . . . . . . . 4-61 Armor Protection (figure) . . . . . . . . . . . . . . . . 2-17 Army Aviation Safety Program . . . . . . . . . . . 1-1 ASE Control Panel (figure) . . . . . . . . . . . . . . 2-46 Audio Warning Signals (table) . . . . . . . . . . . . 2-85 Audio Warning System, Headset . . . . . . . . . 2-85 Authorized Armament Configurations . . . . . 4-10 Automatic Direction Finder Set, AN/ARN-149(V)3 . . . . . . . . . . . . . . . . . . . . 3-32 Automatic Direction Finder Set, AN/ARN-149(V)3 Antenna . . . . . . . . . . . . 3-32 Automatic Direction Finder Set, AN/ARN-149(V)3 Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32 Automatic Direction Finder Set, AN/ARN-149(V)3 Modes of Operation . . 3-33 Automatic Direction Finder Set, AN/ARN-149(V)3 Operating Procedures 3-34 Autorotation Glide Chart (figure) . . . . . . . . . . 9-8 Auxiliary Fuel Tank . . . . . . . . . . . . . . . . . . . . . 2-40 Auxiliary Fuel Tanks . . . . . . . . . . . . . . . . . . . . 6-6 Auxiliary Fuel Tanks, Fuel Loading (table) . 6-9 Average Arm, (Weight and Balance Definition) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Aviation Life Support Equipment (ALSE) . . 8-1 Avionics Description . . . . . . . . . . . . . . . . . . . . 3-1 Avionics Equipment Configurations . . . . . . . 3-1 Avionics Power Supply . . . . . . . . . . . . . . . . . . 3-1 AWS Dynamic Harmonization . . . . . . . . . . . . 4-10 AWS Harmonization Procedures . . . . . . . . . 4-66 AWS Harmonization Wide FOV Corrector Guide (figure) . . . . . . . . . . . . . . . . . . . . . . . 4-66.1 AWS Harmonization Narrow FOV Corrector Guide (figure) . . . . . . . . . . . . . . . . . . . . . . . 4-66.2 B Backup Bus Controller (BBC) . . . . . . . . . . . . 4-14 Backup Control System (BUCS) . . . . . . . . . . 2-47 Backup Control System Failure . . . . . . . . . . 9-14 Balance Definitions . . . . . . . . . . . . . . . . . . . . . 6-3 Basic Moment, (Weight and Balance Definition) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Basic Weight, (Definition) . . . . . . . . . . . . . . . . 6-3 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66 Bay, Survival Kit . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Before Exterior Check . . . . . . . . . . . . . . . . . . 8-2