As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - SMOKE DETECTION LIGHT ACTIVATED ON TAXI-OUT. AIRCRAFT RETURNED TO GATE. LIGHT EXTINGUISHED UPON ENGINE SHUTDOWN. NO SMOKE OR FIRE DETECTED. DETERMINED TO BE FALSE INDICATION. CLEANED MOISTURE FROM SMOKE DETECTOR CANNON PLUG. SMOKE DETECTION SYSTEM OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)