As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - FLT 1802 EN ROUTE PHX TO LAS. LT ENGINE OVERHEAT CAME ON AT FL280. EGT WAS NORMAL. LT WENT OUT AFTER 2 MINUTES OF REDUCED OPERATION. DECLARED AN EMERGENCY AS A PRECAUTION. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE GROUND RAN ENGINE 5 MIN AT GATE. NO OVERHEAT NOTED.