As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3561 CREW REPORTED DURING TAXI "PASS O2" LIGHT ILLUMINATED FOLLOW BY "PASS OXY ON" EICAS MESSAGE. ALL O2 MASKS IN PASS CABIN DEPLOYED. AIRCRAFT REMOVED FROM SERVICE. INSTALLED NEW WIRE OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.