As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLD 1 LEAK EICAS WARNING MESSAGE ALONG WITH LEAK INSCRIPTION ON BLEED 1 PUSH BUTTON PRESENT WHILE RUNNING THE APU AT THE GATE. APU BLEED WAS OPEN BLEED 1 AND BLEED 2 CLOSED. C/A-REMOVED AND REPLACED AIR BLEED LINE PAIR OF ORINGS IN JOINT #3 TAW AMM 36-11-10. OPS CHK GOOD, NO LEAKS NOTED AT THIS MOMENT.