What was found
WHEN LANDING GEAR RETRACTED AFTER TAKEOFF, THE NOSE GEAR DOOR LIGHT REMAINED ILLUMINATED ON BOTH INDICATORS WITH GEAR HANDLE OFF VIBRATION WAS FELT WITH HANDLE UP, NO VIBRATION. FOUND LT NOSE GEAR DOOR LOCK FITTING LOOSE. SECURED FITTING, OPS CHECKED GOOD PER MM 32-22-11.