TM 1-1520-238-23 Change 5 Index 155 Subject Para No. Subject Para No. Retainer and Plain Encased Seal Removal/Installation, Main Rotor Upper Seal . . . . . . . . . . . . . . . . . . . . . . . 5.45 Retainer and Rotor Hub Bearing Removal/Installation, Main Rotor Lead Lag Link Bearing . . . . . . . . . . . . . 5.32 Retainer Removal/Installation (AVIM), Mast Base Oil Seal . . . . . . . . . . . . . . . . 6.100 Retainer Removal/Installation, CPG Cyclic Stick Lever Lock Release . . . . 11.75 Retainer Replacement (AVIM), Main Rotor Lower Seal and Oil Seal . . . . . . 5.46 Retainer Reseating, Main Rotor Lower Oil Seal . . . . . . . . . . . . . . . . . . . . . . . . . . 5.46A Retention Nut Installation, Main Rotor Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20 Retention Nut Removal, Main Rotor Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.19 Reticle Unit (BRU) Mount Adapter Removal/Installation, Pilot Boresight . 2.187 Reticle Unit (BRU) Mount Removal/Installation, Pilot Boresight . 2.186 Retirement Schedule, Overhaul and . . . 1.138 Return Accumulator Nitrogen Manifold Fill/Bleed Valve Replacement, Utility Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . 7.95 Return Accumulator Nitrogen Manifold Pressure Gage Replacement, Utility Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . 7.96 Return Accumulator Nitrogen Manifold Replacement, Utility Hydraulic . . . . . . 7.98 Return Accumulator Nitrogen Manifold Tube Removal/Installation, Utility Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . 7.97 Return Accumulator Removal/Installation, Utility Hydraulic 7.94 Return Accumulator Servicing – Nitrogen, Utility Hydraulic . . . . . . . . . . 1.37 Return Accumulator Venting, Utility Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . 1.39 Return Check Valve Replacement, Utility Hydraulic Auxiliary . . . . . . . . . . . 7.110 Return Coupling Replacement, Primary Hydraulic GSE . . . . . . . . . . . . . . . . . . . 7.24 Return Coupling Replacement, Utility Hydraulic GSE . . . . . . . . . . . . . . . . . . . 7.81 Return Filter Sleeve, Manifold Guide, and Spring Replacement, Hydraulic Manifold . . . . . . . . . . . . . . . . . . . . . . . . . 7.70 Return Hose Replacement, Directional Servocylinder Primary . . . . . . . . . . . . . 7.37 Return Hose Replacement, Directional Servocylinder Utility . . . . . . . . . . . . . . . 7.39 Return Hose Replacement, Primary Hydraulic Pump . . . . . . . . . . . . . . . . . . 7.6 Return Hose Replacement, Utility Hydraulic Accumulator APU Start Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.90 Return Hose Replacement, Utility Hydraulic Pump . . . . . . . . . . . . . . . . . . 7.60 RF Override Switch Replacement, Collective Stick . . . . . . . . . . . . . . . . . . . 11.30 Rig Connecting Link Actuating Link Rod and Rod End Clevis Replacement, Engine Access and Ventilation Door Assembly . . . . . . . . . . . . . . . . . . . . . . . . 2.145 Rig Connecting Link Removal/Installation, Engine Access and Ventilation Door Assembly . . . . . 2.144 Rigging Check, No. 1 and No. 2 Engine Load Demand Spindle . . . . . . . . . . . . . 4.184 Rigging Collective Flight Controls Between Pilot and CPG Collective Sticks . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.281 Rigging Collective Flight Controls Between Pilot Collective Stick and Collective Servocylinder . . . . . . . . . . . 11.282 Rigging Collective Upper Flight Controls 11.284 Rigging Directional Flight Controls Between Pilot and CPG Pedals . . . . . 11.293 Rigging Directional Flight Controls Between Pilot Pedals and Directional Servocylinder . . . . . . . . . . . . . . . . . . . . 11.294 Rigging Flight Controls . . . . . . . . . . . . . . . 11.280