As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOARD RIGHT STABILIZER AMBER CAUTION LIGHT ILLUMINATED IN FLIGHT WITH LEADING EDGE DEICING SYSTEM OPERATING. RETURNED TO SFO. REPLACED BAD PRESSURE SWITCH FOR RIGHT INBOARD STABILIZER BOOT. RAN BOTH ENGINES. CYCLED BOOTS SEVERAL TIMES, ALL CHECKS GOOD.