As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 906 36-21 2082641 02NOV19 BUF CLOSE BLEED 1 LEAK EICAS MSG IN FLIGHT DURING ICING CONDIT IONS. FACT 03NOV19 06:34 BUF PERFORMED OPS CHECK OF BLD SYS FAILED BLD 1 VLV FAIL . RNR BLD VLV 1 PERFORMED OPS CHECK OF BLDS SYS OPS CHECK GOOD IAW AMM 36-00-00 AND 36-11-05 OK FOR SERV ICE. NO FURTHER LEAKS NOTED.