As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, RAISED GEAR. LT MAIN HAD PRIMARY AND SECONDARY UNSAFE INDICATION. COMPLIED WITH QRH PROCEDURE AND CYCLED GEAR. NOW PRIMARY AND SECONDARY INDICATIONS UP AND LOCKED. LT GEAR UP AND LATCHED A/B SENSOR DISAGREE FAULT. CHECKED RTS ON PSEU BOX AND IT CHECKED NORMAL. CHECKED RIG ON ALL GEAR SENSORS AND THEY CHECKED NORMAL, PROXIMITY SENSOR READOUT WAS NORMAL. INSPECTED LT GEAR UPLOCK SENSOR AND WIRING AND CLEANED SENSOR. MM 31-71-01-2. OK TO CONTINUE.