What was found
DURING CLIMBOUT, THE NR 3 ENGINE STRUT OVERHEAT LIGHT ILLUM. BOTH NR 3 BLEED AND RIGHT PACK WERE ON AT THE TIME. AFTER RED TABS CALLED FOR CLOSING/OFF ON BOTH NR 3 BLEED AND RIGHT PACK, THE NR 3 STRUT LIGHT WENT OUT. ENGINE PARAMETERS OK. REMOVED AND REPLACED CRACKED DUCT FOUND DURING ENGINE RUN UP PER M/M 36-00-02. NEEDS LEAK AND OPERATIONAL CK. RAN ENG PER JET RUN HANDBOOK, STRUT OVERHEAT LIGHT DID NOT ILLUMINATE. DURING LEAK CK FOUND AIR LEAKING AT GASKET, (P/N 800347) REF ITEM NR 30 ILLUSTRATED PART CAT 36-10-00 FIGURE 5 GASKET IN STOCK PHX, REMOVED ADN REPLACED DUCT PER M/M REF 36-00-2, LEAK CK GOOD.