What was found
FLIGHT RETURNED TO DEPARTURE DUE TO THE INABLITY TO RAISE THE LANDING GEAR DURING CLIMB TO 6000 FT. NO APPLICABLE QRH PROCEDURES, NO EMERGENCY DECLARED. MAINTENANCE FOUND THE LEFT GEAR SHORTENING MECHANISM LINKAGE BROKEN. COMPLIED WITH ERA 520918-14, REPLACED BELLCRANK, PERFORMED GEARSWING, OPS CHECKED GOOD. 32-31-00-740-801.