As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION NOSE AND RIGHT MAIN RETRACTED, LEFT MAIN DOOR CLOSED, LEFT RED AND GEAR HANDLE ILLUMINATED, THEN LEFT GEAR DOOR OPENED AND LEFT GEAR RETRACTED. REMOVED AND REPLACED LT SEQUENCE VALVE IAW Q400 AMM 32-31-36, ALSO REPLACED LGDNLK1 PROX SENSOR DUE TO TWO RECENT OPEN FAULTS IAW Q400 AMM 32-61-06, CHECKED PSEU IAW Q400 AMM 32-61-00 BEFORE AND AFTER PERFORMING MULTIPLE PRIMARY EXTENSION AND RETRACTION CHECKS IAW 32-31-00. NO FAULTS FOUND BEFORE OR AFTER EXTENSION AND RETRACTION CHECKS.