46-06-02 KINNER: (Was Mandatory Note 8 of AD-749-1 and Special Note 11 of AM-231.) Applies Only to Jobmaster DGA-18K and Ryan ST-3KR Airplanes With R-5 Series 2 Engines With the Following Serial Numbers: 371, 378, 379, 380, 383, 386, 398, 399, 400, 401, 404, 405, 406, 407, 409, 410, 411, 413, 414, 415.
Install master rod (P/N 835) before exceeding 200 hours total operation with the early type rod. This replacement should preclude further master rod failures and involves the rebalancing of the crankshaft and rod assembly.
(Kinner Service Bulletin No. E-1-8 dated July 24, 1942, covers this same subject.)