What was found
WHILE TAXIING, NR 1 NACELLE OVERHEAT WARNING LIGHT CAME ON, AIRCRAFT BLOCKED IN WITHOUT INCIDENT. INSPECTED NR 1 ENGINE AND FOUND CLAMP ON F-STACK BLEED AIR DUCT NOT ALIGNED. REMOVED CLAMP, RESEALED DUCT AND REINSTALLED CLAMP, OPS CHECKED AND LEAK CHECKED GOOD.