What was found
DTW - FLT 629 - DURING TAKEOFF, ON 21L RECEIVED WINDSHEAR WARNING, PUSHED THROTTLES TO STOP FOR APPROX 20 SECONDS, AT ROTATION. PERFORMED BORESCOPE INSPECTION ON NR 1 AND NR 2 ENGINES. REMOVED AND REPLACED OIL FILTERS AND INSPECTED ENGINE MAG PLUGS, ALSO PERFORMED A VISUAL INSPECTION OF NR 4 GEARING RETURN LINE TEMP TAPE. NO DISCREPANCIES FOUND REF LG PG 111366 ITEM 1, 2, AND 3. (M)