As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AT PHX EN ROUTE FOR TUS RT WING TO BODY LIGHT ILLUMINATED CONTINUOUSLY, FOLLOWED QRH PROCEDURES AND TURNED BACK TO PHX. MAINTENANCE REMOVED AND REPLACED THE RT ENGINE STRUT DETECTOR ELEMENT (M488) IAW BMM 26-18-11 PG 401. RAN ENGINE, APU AND RT AIR CONDITIONING PACK, OPERATIONAL CHECK WAS GOOD.