As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT WING BODY OVERHEAT ILLUMINATED RIGHT AFTER TAKE OFF, AFTER TURNING LEFT BLEED AND PACK OFF, LEFT WING BODY OVERHEAT LIGHT EXTINGUISHED. AN EMERGENCY WAS DECLARED, RETURNED TO DEPARTURE, AND LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED. ACCOMPLISHED REPLACEMENT OF THE PACK OVERHEAT DETECTORS (M355 AND M1909). TROUBLESHOOTING LEFT PACK WIRING PER FIM 26-18-00-810-802, ALL OPS CHECKED NORMAL.