What was found
NR 1 ENGINE STRUT OVERHEAT LIGHT CAME ON JUST AFTER TAKE-OFF. CREW RETURNED AIRCRAFT TO DEPARTURE AERODROME (FWA) WHERE AN UNEVENTFUL LANDING WAS MADE. DUPLICATED PROBLEM DURING GROUND ENGINE RUN. TIGHTENED SEVERAL CLAMPS ON BLEED LINES AND (B) NUT ON SENSE LINES. RE-ADJUSTED STRUT OVERHEAT LOOP. OPS CHECK GOOD ON GROUND DURING ENGINE RUN. AIRCRAFT WAS RETURNED TO SERVICE.