What was found
NR 1 ENG ON CLIMB-OUT 3000-4000FT MSL ENG OIL BYPASS LIGHT ILLUMINATED AND EXTINGUISHED AFTER 30 SEC NO POWER CHANGE. THEN AFTER 1 MIN OIL BYPASS LIGHT ILLUMINATED EXECUTED QRH PROCEDURE PULLED POWER BACK LIGHT WENT OUT BELOW 70 N1. ALL OTHER ENG INDICATIONS NORMAL. RTB LAX , BITE ECC 1 AND 1A FOR FAULTS PER FIM NO MSG-NO FILTER MSG. TROUBLE SHOOT PER FIM 79-05-00-810-817. FOUND NON METALLIC PARTICLES IN AFT SCAVENGE CHIP DETECTOR. REMOVED FOR LAB ANALYSIS. RAN ENG NR 1 TO 70 PERC N1 FOR 10 MIN. REINSPECT CHIP DETECTORS, NO PARTICLES FOUND MCO PLACARD REMOVED.