As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR RETRACTION UNSAFE INDICATION ON RIGHT MAIN GEAR IN UP POSITION. QRH CHECK LIST COMPLETED AND RETURNED TO IAH. REMOVED AND REPLACED RT MAIN LANDING GEAR UPLOCK SENSOR (S74) PER AMM 32-61-21. ADJUSTED SENSOR PER AMM 32-61-21 AND TESTED SYSTEM PER AMM 32-61-00. OPERATIONAL CHECKS NORMAL.