As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 206 EN-ROUTE MIA - MXP. THE AIRCRAFT WAS GROUNDED. LT ENG PRV EICAS MSG. QRH PROCEDURE COMPLIED WITH. MSG ACCOMPANIED W/LOSS OF LT DUCT PRESS. WOULD NOT RESET HAPPENED ON CLIMB OUT LIGHT STAYED ON DUCT PRESS STAYED LOW UNTIL SHUT DOWN. MAINTENANCE REMOVED AND REPLACED PRESSURE REGULATING VALVE CONTROLLER IAW AMM 36-11-19 GROUND RAN A/C OPS CHK GOOD.