58-22-02 NORTH AMERICAN: Applies to all Model T-28A Aircraft Certificated in the Restricted Category. \n\n\tInspect the main landing gear trunnion shaft every 200 hours with a borescope or by an equivalent method for fatigue cracks emanating from the bolt holes. Replace all defective shafts. \n\n\t(USAF T.O. 1T-28A-6 Page 39, Item 11, covers this same subject.)