AD 70-13-03

70-13-03 CONTINENTAL: Amendment 39-1017. Applies to Continental Model TSIO-520-C (Serial Numbers 140001 through 140678) engines installed in Cessna Model TU206, TP206 and T210 airplanes. Compliance: Unless already accomplished, within the next 12 months after the effective date of this AD, accomplish the following: To prevent hydraulic lock and resulting engine damage and power loss: Replace the presently installed Teledyne Continental Motors Part Number 633125 balance tube assembly with new Teledyne Continental Motors Part Number 635645 balance tube assembly and install associated aircraft installation drainage provisions in accordance with Cessna Service Kit SK206-10, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region, Kansas City, Missouri. Teledyne Continental Motors Service Bulletin M70-5 dated May 6, 1970, also pertains to this subject. This amendment becomes effective July 2, 1970.