As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1432 LGB-SFO RT REAR CABIN DOOR OPEN INDICATION IN FLIGHT. FLIGHT RETURNED TO FIELD (LGB). PER TSM 52-13-00-810-804 REMOVED AND REPLACED PROX SENSOR 17WV2 IAW AMM 52-73-21. ALL INDICATIONS NORMAL WHILE A/C WAS PRESSURIZED TO 2 PSI. A/C OK FOR SERVICE.