TM 1-1520-238-23 1-406 Change 10 1.138. OVERHAUL AND RETIREMENT SCHEDULE – continued Part Name Retirement Interval Notes Retirement Interval Hours Overhaul Interval Notes Overhaul Interval Hours Part Number Stretched Strap 7-311411146-5 1 4,500 7-311411146-7 1 4,500 * Lead Lag Link Assembly 7-311411155 1 5,200 7-311411155-5 1 5,200 7-311411155-9 1 5,200 7-311411155-11 1 5,200 * Feathering Bearing 7-311411193 1 7,100 7-311411193-11 1 7,100 7-311411193-15 1 7,100 * Pitch Housing 7-311411215 1 5,300 7-311411215-7 1 5,300 7-311411215-11 1 5,300 7-311411215-13 1 5,300 7-311411215-15 1 5,300 M/R Hub Retention Nut 7-311411102 22,500 7-311411102-3 22,500 7-311411102-5 22,500 Main Rotor Blade 7-311412000 4,700 7-311412000-3 4,700 7-311412000-5 4,700 * Swept Tip 7-311412035-3 18,000 Main Rotor Attach Pin ABC-6652 6,310 12 ADP236-5 6,310 12 ADP236-15 6,310 12 SL54005 6,310 12 53460-3 824 12 53460-13 824 12 Tail Rotor Fork Assembly 7-211421008-7 4,700 7-211421008-9 4,700 7-211421008-11 4,700 Tail Rotor Hub 7-211421037-3 22,000 7-211421037-7 22,000 GO TO NEXT PAGE