As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH CREW SELECTED GEAR DOWN WHEN THEY DID NOT GET THE PROPER INDICATION THEY ALERTED THE TOWER. THE TOWER CONFIRMED THAT THE GEAR IN FACT WAS NOT DOWN. THE CREW FOLLOWED PROCEDURE AND BLEW THE GEAR DOWN WITH EMERGENCY AIR. ON 3/31/2022 IT WAS DISCOVERED DURING TROUBLESHOOTING THAT THE LH INBD GEAR DOOR ACTUATOR WAS LEAKING FLUID INTO THE INBD GEAR DOOR SWITCH CAUSING THE SWITCH RESISTANCE TO CHANGE AND IN TURN THE SEQUENCING OF GEAR OPERATION WAS DISRUPTED.