As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURN BACK - FLT 0297 - ON CLIMB OUT OF PHX EN ROUTE FOR SJC THE RT WING TO BODY OVERHEAT LIGHT ILLUMINATED. TURNED BACK TO PHX, LIGHT REMAINED ILLUMINATED UNTIL AFTER LANDING. MAINTENANCE PERFORMED ENGINE RUN AT CLIMB POWER, FENWAL DIGITAL BOX 44 OVERHEAT CONDITION (AFT BAG PIT AREA) WAS DUPLICATED WITHIN 3 MINUTES OF RUN. REMOVED AND REPLACED COMPARTMENT OVERHEAT ACCESSORY UNIT IAW BMM 26-10-02, PG. 401. REACCOMPLISHED ENGINE RUN AT CLIMB POWER FOR 10 MINUTES, NO FAULTS NOTED. SDR WILL BE SUBMITTED UPON RECEIPT OF VENDOR TEARDOWN REPORT.