What was found
FLT#8417, BOS-JFK. (ETOPS) 'REF MDDR 561406 (REF LP 4142783-2 *** EVF FLIGHT UNSUCCESSFUL** DUE TO AIR BLEED CLASS II MX MESSAGE . ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY 1) FAULT(S) INDICATED BY AIR BLEED )) CLASS II AIR BLEED; R/R SENSE LINE FROM 7HA1 IAW AMM 36-11-86 AND REMOVED AND REPLACED FLEX LINE PRV ECS SENSE LINE IAW AMM 36-11-49. LEAK CHECK GOOD, HOWEVER FURTHER T/S REQ. REF L/P 4142786 ITEM 1 (DURING LEAK CHKS FOUND BLEED LEAK COMING FROM TUBE ASSY - ECS - SENSE PYLON-HPV. REMOVED SENSE LINE IAW 36-11-86. REQ'S INSTALLATION , OPS CHECK AND LEAK CHECK. WORK ON GOING) AND ITEM 2 (INSTALLED TUBE ASSY ECS SENSE PYLON HPV IAW AMM 36-11-49. PERFORMED ENG IDLE RUN IAW AMM 71-00-00. NO LEAKS NOTES. NO CLASS II MSG'S NOTED. NO FAULTS NOTED. AS PRECAUTIONARY, PERFORMED HIGH POWER ASSURANCE TEST IAW AMM 71-00-00. NO DEFECTS , FAULTS NOTED. ALL PARAMETERS OK.) .