80-25-08 BOEING VERTOL (VERTOL): Amendment 39-3987. Applies to Vertol Model 107-II helicopters certificated in all categories.
Compliance required as indicated.
To prevent fatigue failure of the main rotor tension-torsion strap assemblies, remove from service tension-torsion strap assemblies Part No. 107R2003-1 upon the accumulation of 27,800 hours in service and replace with an airworthy part that meets the requirement of this AD.
This amendment is effective December 12, 1980.