What was found
PMA BOLT, P/N 772568QQ, REPLACEMENT FOR OEM BOLT, P/N 772568, FAILED AFTER 780.0 HOURS AND 1,169 CYCLES IN SERVICE. BOLT FRACTURED CAUSING HEAD TO BE INGESTED INTO THE N-2 COMPRESSOR DRIVE TURBINE WHERE EXTENSIVE DAMAGE WAS INFLICTED. BOLT WAS FROM AFFECTED BATCHES AS DESCRIBED IN FLIGHT STANDARDS INFORMATION BULLETIN FOR AIRWORTHINESS NUMBER FSAW 99-07.