As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF WHEN GEAR WAS RETRACTED LEFT MAIN GEAR "UNSAFE" "RED" LIGHT ILLUMINATED WITH GEAR HANDLE IN UP POSITION. FOUND LEFT MLG UP AND LATCHED PROXIMITY SENSOR SPRING BROKEN. REMOVED AND REPLACED SPRING. ADJUSTED PROXIMITY SENSOR IAW AMM 32-61-00. OPS CHECK GOOD. OK FOR SERVICE. REMOVED AND REPLACED THE SPRING IAW AMM 32-61-02.