What was found
FLIGHT: 9307 FPO/FLL DURING FLIGHT LT MAIN GEAR GREEN (A) ANNUNCIATOR ILLUMINATED. UPON ARRIVAL AT FLL LANDING GEAR SELECTED DOWN RED (A) AND (B) ANNUNCIATORS ILLUMINATED EXCEPT LT MAIN GEAR GREEN (A) ANNUNCIATOR. PERFORMED ALTERNATE LANDING GEAR EXTENSION. POST FLIGHT REVEALED RIGHT INNER GEAR DOOR MISSING BOLT AT LATCH. DETERMINED MISSING BOLT RESULTED IN THE DISAGREEMENT OF RED (A) AND (B) ANNUNCIATORS RESULTING IN THE ALTERNATE LANDING GEAR EXTENSION. REPLACED SHEARED BOLT AT RT INNER GEAR DOOR ALSO REPLACED THE LT DOWN LOCK PROXIMITY SENSOR HARNESS FOR THE LT MAIN GEAR GREEN (A) ANNUNCIATOR. OPS CHECK NORMAL. TEST FLIGHT SATISFACTORY.