What was found
AFTER TAKEOFF DURING CLIMB OUT AT ABOUT 5000 FT A BLD 2 LEAK MSG WAS PRESENT ON EICAS WITH NO BLD LEAK LIGHT ON THE BLD 2 PB. WHILE COMPLYING WITH AOM 1 PROCEDURE A BLD 1 LEAK MSG WAS PRESENT ON EICAS WITH NO BLD LEAK LT ON THE BLD 1 PB, CONTINUED WITH BOTH BLDS OFF & BOTH PACKS OFF, AFTER ABOUT 5 MIN BLD 2 LEAK MSG DISAPPEARED & BLD 1 LEAK MSG AWAY & CAME BACK ON ABOUT 5 MIN. PERFORMED BLD DUCTS INSPECTION CHECK & FOUND PACK 1 DUAL VLV TUBE ASSY LEAKING. R & R IAW AMM 21-51-14. FOUND BROKEN WIRE ON THERMAL SENSOR WIRE IAW SWPM 20-21-00. PERFORMED OPS & LEAK CHECK WITH APU BLD BOTH PACKS RUNNING FOR ABOUT 30 MIN. ALSO WITH ENG & PACKS RUNNING AT HIGH POWER FOR 5 MIN & NO LEAKS OR MSG AT THIS TIME IAW AMM 72-00-00 36-00-00.