As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW ON FLT 145, DISCOVERED ON APPROACH THAT THE AIRPLANE LANDING GEAR WOULD NOT EXTEND. TOWER WAS NOTIFIED. INITIATED MANUAL GEAR EXTENSION PROCEDURES, WHICH WERE SUCCESSFUL. LANDED WITHOUT INCIDENT. MX FOUND THE 60 AMP LANDING GEAR CIRCUIT BREAKER IN LT NACELLE TRIPPED. THE GEAR WAS RETRACTED AND EXTENDED SEVERAL TIMES BUT THE DEFECT COULD NOT BE DUPLICATED. AN OPS CHECK FLIGHT WAS CONDUCTED SUCCESSFULY WITH NO REOCCURRANCE OF THE LANDING GEAR ISSUE. RELEASED BACK TO SERVICE.