What was found
BDA - FL 1459 - WHILE CLIMBING OUT OF DBA AT 24,000 FEET, THE NR 1 ENGINE OVERHEAT LIGHT ILLUMINATED. REDUCED THRUST TO IDLE, HOWEVER, LIGHT REMAINED ON. CAPTAIN SHUT DOWN THE NR 1 ENGINE AND RETURN TO BDA. TOTAL SINGLE ENGINE TIME WAS 16 MINUTES. MAINTENANCE CHECKED FOR AIR LEAKS. NO LEAKS FOUND. PERFORMED ENGINE RUN AT HIGH POWER. CHECKS NORMAL. FOUND B LOOP WOULD NOT TEST ON GROUND. ACCOMPLISHED CONTINUITY CK OF NR 1 ENGINE B LOOP FROM M279 PLUG D1002. FOUND NORMAL. CHECKED ALL B LOOP CONNECTORS FOR DEFECTS, NONE FOUND. PERFORMED B LOOP OPERATIONAL CHECK, CHECKED NORMAL. (M)