As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR EXTENSION GOT UNSAFE LEFT GEAR LIGHT ON FWD INST PANEL AND CONSTANT GEAR WARNING HORN WITH FLAPS AT 25 OR 30 DEG. SECONDARY GEAR INDICATION LIGHTS (S/O PANEL) NORMAL. COMPLIED WITH ABNORMAL CHECKLIST. CYCLED GEAR 3 TIMES, HAND CRANKED LEFT MAIN, CONDUCTED LOW FLYBY AND LANDED WITH UNSAFE INDICATION. REMOVED AND REPLACED LT MAIN GEAR DOWNLOCK SENSOR IAW MM 32-61-91. OPS CHECK.