What was found
AT 35,000 FEET, HEARD/FELT LOUD THUMP FROM LT SIDE. LT ENGINE INSTRUMENTS ROLLED BACK ON ITS OWN; REDUCED LT THROTTLE TO IDLE THEN SHUT DOWN BY CHECK LIST. INSP INLET AND EXHAUST-ALL OK-REPLACED LT INLET COWL AND NOSE BULLET. EPR LEAK CKS GOOD. BORESCOPED 6TH/7TH STAGE OF COMPRESSOR. ALL OK. RAN ENG TO TAKEOFF POWER. ALL IND NORMAL. ALSO REPLACED F/C LAV TANK ASSY DUE TO PREVIOUS WRITE-UPS ON LAV LEAKAGE. PRESS A/C, LEAK CKS OK. CLEANED BLUE STREAK FROM FUSELAGE AREAS. ENGINE TOTAL CYCLES, 13,376.