As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS IN THE PROCESS OF LANDING WHEN A PASSENGER NOTICED THE RIGHT GER TRAILING AND NOT IN THE DOWN AND LOCK POSITION. AFTER SEVERAL ATTEMPTS TO PUT GEAR DOWN ELECTRICALLY, PILOT PUMPED THE GEAR DOWN MANUALLY INTO LOCK POSITION. UPON TROUBLE SHOOTING, FOUND THE RIGHT MAIN LANDING GEAR DOWNLOCK SWITCH STUCK IN THE CLOSED POSITION WHICH MENT, WHEN THE OTER TWO GEARS LOCKED THE PUMP MOTOR QUIT RUNNING BEFORE THE RIGHT GEAR HAD A CHANCE TO LOCK INTO POSITION. INSTALLED NEW SWITCH (PN P6-340005). OPS CHECKED GOOD. TT 4240