What was found
(CAN) ON T/O, A CLUNK HEARD NEAR END OF MLG TRAVEL DURING RETRACTION. NO DIFFERECE IN FLT CONTROL. PILOTS INFORMED RT MLG HANGING. MLG SELECTED DOWN STEEP BANKS & YAWS PERFORMED TO GET RT MLG LOCKED. NO DOWN & LOCKED IND EVIDENT, A/C LANDED UNEVENTFULLY. RT MLG NOT LOCKED, SIDE BRACE LOCK NOT OVER-CENTER AND DOWNLOCK SPRING BROKEN. JACKED A/C, RT TORQUE TUBE ASSY BROKEN AT OTBD PUSH-PULL TUBE ATTACH POINT. INVEST REVEALED A CRACK AT ATTACH POINT. THERE IS NO SPECIAL INSPECTION ON THIS PART OF MLG, DIFFICULT TO DETECT A CRACK WITHOUT REMOVING TORQUE TUBE FROM A/C. TORQUE TUBE AND RETRACTION SYSTEM TEARDOWN AND INSPECT REQUIRE INITIAL INSPECTIONS AT 10000 HOURS. A/C HAS ONLY 7621.4 HOURS SINCE NEW.