As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE LEFT ENVIROMENTAL FAIL LIGHT ILLUMINATED AND WOULD NOT RESET. UPON RETURN TO BOSTON THE DISCREPANCY WAS INITIALLY DEFERRED. AFTER RETURN TO BOSTON THE RT PRESSURE REGULATING SHUT OFF VALVE WAS REMOVED AND REPLACED. GROUND CHECK GOOD.