What was found
B-18205 CREW INFORMED DURING SPEED RECOVERY ENG 1/2/3 N2 & ENG 4 N1 OVER SPEED WERE RECORDED. CHECK ENG EXCEEDED REPORT FOUND ENGINE 1 N2 MAX 105.6 LASTING 7 SEC, ENG 2 N2 MAX 105.6 LASTING 3 SEC, ENG 3 N2 MAX 105.6 LASTING 7 SEC, ENG 4 N1 MAX 111.5 LASTING 2 SEC ENG EXCEEDED EICAS PAGE ENG 1 105.6 :06, ENG 2 105.5 :05, ENG 3 105.6 :08, ENG 4 111, 4 :03. ALL ENGS WERE SWITCHED TO ALTERNATE MODE DUE TO ENG 4 EEC MODE ON NOV. 20. FOLLOW AMM 72-00-00/630, ENG OVER SPEED INSPECTION, ALL ENGS OVER SPEED LESS THAN 1%, N1 LIMIT 111.4%, N2 LIMIT 105.5% & FELL IN AREA A OF FIGURE 604, DO INSPECTION AS FOLLOW. MAKE SURE THE ROTOR TURNS FREELY. EXAMINE THE INLET & EXHAUST DUCTS FOR UNWANTED MATERIAL WAS NORMAL. EXAMINE THE INLET & EXHAUST DUCTS FOR DAMAGE WAS NORMAL. ENG TEST IDLE POWER OPERATED NORMAL, AIR CRAFT RETURN TO SERVICE.