What was found
STL - DURING CLIMB, SHUT DOWN NR 1 ENGINE, DUE TO OIL FILTER BYPASS LIGHT ILLUMINATION. FOUND METAL PARTICLES IN OIL FILTER. REPLACED ENGINE. GROUND OPERATION CHECKED NORMAL. INVESTIGATION OF OIL FILTER BYPASS LIGHT ILLUMINATION AND METAL PARTICLES FOUND IN OIL FILTER OF NR 1 ENGINE REVEALED NR 3 BEARING FAILED. REMOVED AND REPLACED NR 3 BEARING, AND ENGINE RETURNED TO SERVICE. (M)