TM 1-1520-238-23 2-316 Change 9 2.89. FORWARD LEFT OR RIGHT CENTER TRANSMISSION ROTOR SUPPORT STRUT ASSEMBLIES REMOVAL/INSTALLATION 2.89.1. Description This task covers: Removal. Cleaning. Inspection. Installation. 2.89.2. Initial Setup Tools: Aircraft mechanic’s tool kit (item 376, App H) 3/4 x 1/2-inch drive socket wrench adapter (item 5, App H) 44-inch x 3/4-inch drive telescopic bar (item 29, App H) 3/4 x 6-inch long driftpin (item 113, App H) 5-inch x 3/4-inch drive socket wrench extension (item 125, App H) 15/16 & 1-inch box wrench (item 412, App H) Mast support wrench (item 413, App H) (p/o item 391 and 391A, App H) or Mast support wrench (item 413A, App H) (p/o item 391A, App H) 100 - 500 foot-pound 3/4-inch drive click type torque wrench (item 438, App H) Materials/Parts: Cotter pin Wire (item 226, App F) Antiseize compound (item 26, App F) Personnel Required: 67R Attack Helicopter Repairer One person to assist 67R3F Attack Helicopter Repairer/Technical Inspector References: TM 1-1520-264-23 Equipment Conditions: Ref Condition 1.57 Helicopter safed 1.79 Air vehicle sling installed 1.97 Maintenance crane installed 2.2 Access panels L200 and R200 removed 2.92 Left forward side transmission rotor support strut assembly removed or 2.93 Right forward side transmission rotor sup- port strut assembly removed 6.90 Air data system (ADS) mast removed 12.32 Main deck fire/overheat detector removed WARNING FLIGHT SAFETY PART Rotor support mast support base is a flight safety part. Failure to follow maintenance instructions may result in serious injury or death of crewmembers and/or serious damage to the helicopter. NOTE This task is typical for forward left and/or right center transmission rotor support strut assemblies. GO TO NEXT PAGE M04-1462-2 VIEW LEFT SIDE