As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE INLET DEICE FAILED AGAIN IN FLIGHT. COULD NOT ESCAPE ICING CONDITIONS ALONG ROUTE AND DIVERTED BACK TO SFO. INSTALLED SERVICEABLE EJECTOR VALVE AND INSTALLED SERVICEABLE PRESSURE SWITCH AND PATCHED SMALL HOLE IN THROAT BOOT SYSTEM. OPS CHECKS GOOD.