What was found
AFTER T/O PASSING THROUGH 9,000 FEET, RECEIVED FIRE WARNING INDICATION ENGINE NR 3. ACCOMPLISHED ENGINE FIRE SEPARATION OR SERVERE DAMAGE CHECKLIST. AFTER FIRE SHUTOFF LEVER MOVED TO SELECT AGENT POSITION, FIRE INDICATIONS CEASED. COMPLETED FIRE WARNING SYSTEM CONTINUITY TEST. DECLARED EMERGENCY LANDING AND MADE UNEVENTFUL LANDING AT KIAH. (EGT SHOWED 500 DEGREES WHEN WARNING RECEIVED).