What was found
WHILE IN CRUISE, CREW REPORTED NR 2 ENGINE TEMP LIMITED AND LOW N1. AIR RETURN TO MEM. MAINTENANCE REPLACED BLOWN OUT COMBUSTER BLEED SEAL ON NR 1 ENG. REMOVED AND REPLACED NR 2 ENG P/N ON/OFF 2-003-040-15, S/N ON PO7801, S/N OFF P07793 IAW MAL JC 7100-502, COMPLETED WORK PACKAGE DATED 6-30-04 OK FOR SERVICE. TROUBLESHOOTING FOUND CUSTOMER BLEED AIR PIPE GASKET BLOWN OUT. REPLACED GASKET P/N RS6263. COMPLETED FOUR POINT ENGINE RUN MARGIN ROW AT +5.5 POWER ASSURANCE/TAKEOFF MARGIN WITHIN LIMITS, REF HONEYWELL AMM 72-00-00 TESTING.