Compliance of Service Notice N-59, AD 68-21-05, and AD 97-05-06against 269A5050-50, -53, and -73 Main Rotor Drive Shaft Thrust Bearing (Applicable to Models 269A, TH-55A, Shaft Thrust Bearing (Applicable to Models 269A, TH-55A,269A-l & 269B)
New Retirement Life for 269A51053-51 Input Pinion and 269A5194 Carrier Assembly Installed in Model 269C-l Helicopters
