TM 1-1520-238-23 Change 4 1-411 1.138. OVERHAUL AND RETIREMENT SCHEDULE – continued Part Name Retirement Interval Notes Retirement Interval Hours Overhaul Interval Notes Overhaul Interval Hours Part Number T/R Pitch Link Assembly 7-311527035-3 22,500 7-311527035-5 22,500 7-311527035-25 22,500 7-311527035-27 22,500 7-311527035-29 22,500 7-311527035-31 22,500 7-311527035-41 22,500 7-311527035-43 22,500 T/R Scissors Link Assembly 7-311527009 22,500 7-311527009-5 22,500 T/R Control Support Bracket 7-311525065 5,300 T/R Gearbox Studs HS5155-0377 18,600 4 T/R Actuator Support Assembly 7-311525062 18,000 7-311525062-3 18,000 7-311525062-5 18,000 7-311525062-7 18,000 7-311525062-9 18,000 7-311525062-11 18,000 7-311525062-15 7,800 7-311525062-19 7,800 T/R Directional Bellcrank 7-311525063 18,000 7-311520563-3 18,000 7-311520563-7 18,000 7-311520563-13 7,800 7-311520563-17 7,800 T/R Link Assembly 7-311525064 18,000 7-311525064-5 18,000 7-311525064-11 7,800 7-311525064-21 7,800 Support Assembly Mixer 7-211160040-5 20,800 7-211160040-7 20,800 Collective Bellcrank 7-311511117 20,800 7-311511117-5 20,800 7-311511117-7 20,800 7-311511117-9 20,800 7-311511117-11 20,800 7-311511117-13 20,800 GO TO NEXT PAGE