What was found
AIR TURN BACK DUE TO BIRDSTRIKE ON NR 1 ENGINE. ENGINE SHUTDOWN, INVESTIGATION FOR ENGINE SHUTDOWN SHOWS THE EGT WAS EXCEEDED AT 1015 DEGREES CELCIUS FOR 21 SECONDS. PERFORMED AN AIRFRAME AND ENG NR 1 BIRDSTRIKE INSP. REF TASK CARDS MP05510-02 AND MP72400-01. PERFORMED TROUBLESHOOTING REF TSM 72-00-00-810-849 AND AMM 75-31-00-200-008. PERFORMED A FADEC MOTORING TEST REF AMM 73-29-00-710-040. NO FAULTS FOUND. INSPECTED VBV AND VSV SYS REF AMM 75-31-00-210-002 AND 75-32-00-210-002. NO DEFECTS NOTED. RESET EGT MAXIMUM POINTERS REF AMM77-00-00-710-042. PERFORMED BORESCOPE INSP OF THE HPT AND LPT STAGE 1, 2 AND 3 REF AMM 72-52-00-290-001 AND 72-54-00-290-005. NO DEFECTS NOTED. PERFORMED POWER ASSURANCE CHECK REF AMM 71-00-00710-008. COMPRESSOR STALLS AT 55 PERCENT TO 60 PERCENT N1, DURING DECELERATION.