TM 1-1520-238-23 Index 80 Change 11 Subject Para No. Subject Para No. Gearbox Aft Cable Support Removal/Installation, No. 1 Engine Power Control . . . . . . . . . . . . . . . . . . . . 4.172 Gearbox Aft Gear Fitting Replacement, Tail Rotor . . . . . . . . . . . . . . . . . . . . . . . . 6.141 Gearbox Aft Strut Removal/Installation, Tail Rotor . . . . . . . . . . . . . . . . . . . . . . . . 6.140 Gearbox and Quill Shaft Removal/Installation, Engine Nose . . 6.36 Gearbox Anti-flail Bearing Nut Disassembly/Assembly, Engine Nose 6.34 Gearbox Baseplate Removal/Installation, No. 1 and No. 2 Engine Power Control Spindle . . . . . . 4.142 Gearbox Breather Removal/Installation, Intermediate . . . . . . . . . . . . . . . . . . . . . 6.126 Gearbox Breather Replacement, Engine Nose . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.24 Gearbox Centrifugal Fan, Input Coupling, and Flange Removal/Installation, Intermediate . . 6.12 Gearbox Drain Hose Removal/Installation, No. 1 and No. 2 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . 4.105 Gearbox Fairing Guide Pin Replacement, Nose . . . . . . . . . . . . . . . 2.124D Gearbox Fairing Latch Replacement, Nose . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.124C Gearbox Fairing Riveted Seal Replacement, Nose . . . . . . . . . . . . . . . 2.124B Gearbox Fairing Stud Nut Replacement, Nose . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.124E Gearbox Filler Cap Removal/Installation, Engine Nose . . 6.23 Gearbox Fixture Adapter and Tail Rotor Gearbox Fixture Installation, Intermediate . . . . . . . . . . . . . . . . . . . . . 1.126 Gearbox Fixture Adapter and Tail Rotor Gearbox Fixture Removal, Intermediate . . . . . . . . . . . . . . . . . . . . . 1.127 Gearbox Fixture Installation, Environmental Control Unit and Nose 1.124 Gearbox Fixture Installation, Intermediate Gearbox Fixture Adapter and Tail Rotor . . . . . . . . . . . . . 1.126 Gearbox Fixture Removal, Environmental Control Unit and Nose 1.125 Gearbox Fixture Removal, Intermediate Gearbox Fixture Adapter and Tail Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.127 Gearbox Flexible Coupling, Vaneaxial Fan, and Inlet Diffuser Removal/Installation, Engine Nose . . 6.33 Gearbox Forward Gear Fitting Replacement, Tail Rotor . . . . . . . . . . . 6.143 Gearbox Forward Strut Removal/Installation, Tail Rotor . . . . . 6.142 Gearbox Fuselage Fairing and Shroud Removal/Installation, Nose . . . . . . . . . 2.123 Gearbox Fuselage Fairing Control Module Assembly Replacement, Nose . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.124 Gearbox Identification Plate Replacement, Engine Nose . . . . . . . . 6.27 Gearbox Identification Plate Replacement, Intermediate . . . . . . . . . 6.128 Gearbox Identification Plate Replacement, Tail Rotor . . . . . . . . . . . 6.137 Gearbox Input Coupling Removal/Installation, Tail Rotor . . . . . 6.15 Gearbox Breather Removal/Installation, Tail Rotor . . . . . . . . . . . . . . . . . . . . . . . . 6.136 Gearbox Input Flange and Output Shouldered Shaft Expansion Plug Replacement (AVIM), Intermediate . . 6.123 Gearbox Input Seal Assembly Removal/Installation, Engine Nose . . 6.37 Gearbox Input Seal Assembly Removal/Installation, Intermediate . . 6.124 Gearbox Input Seal Assembly Removal/Installation, Tail Rotor . . . . . 6.135 Gearbox Inspection, Engine Nose . . . . . 6.17 Gearbox Inspection, Intermediate . . . . . 6.121 Gearbox Inspection, Tail Rotor . . . . . . . . 6.132 Gearbox Low Oil Pressure Switch Removal/Installation, Engine Nose . . 6.21 Gearbox Lube Pump Cartridge Removal/Installation, Engine Nose . . 6.30A Gearbox Lube Pump Removal/Installation, Engine Nose . . 6.30