What was found
ON FINAL, THE FLAPS MADE A LOUD POPPING SOUND. REMOVE FLAP ACTUATOR AND FOUND THAT THE GEAR BOX HAD ONE GEAR WITH THE TEETH MISSING.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ON FINAL, THE FLAPS MADE A LOUD POPPING SOUND. REMOVE FLAP ACTUATOR AND FOUND THAT THE GEAR BOX HAD ONE GEAR WITH THE TEETH MISSING.