What was found
LEFT MAIN GEAR INDICATED UNSAFE UPON RETRACTION. ACCOMPLISHED CHECKLIST, RETURNED GEAR TO SAFE DOWN INDICATIONS, UNEVENTFUL LANDING. IDENTIFIED PARTS LANDING GEAR EXTENSION. FOUND LT MLG UPLOCK CRANK EXTENSION SPRING BROKEN, REF IPC 32-34-02-01, FIG. 1, ITEM 091. REPLACED SPRING REF MD10 IPC 32-34-02-01, FIG. 1, ITEM 091. PERFORMED MAIN LANDING GEAR EXTENSION/RETRACTION TEST (4 CYCLES) IAW AMM 32-30-00-5 - SATISFACTORY. BOTH PRIMARY AND SECONDARY LANDING GEAR INDICATIONS NORMAL . OK FOR SERVICE.