What was found
WHILE ON TAXI OUT, PDX FMC DISAGREE MASTER CAUTION ANNUNCIATED. ACFT GROUNDED. RAN QRH FOR ON GROUND ISSUE AND ISSUE WAS RESOLVED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE ON TAXI OUT, PDX FMC DISAGREE MASTER CAUTION ANNUNCIATED. ACFT GROUNDED. RAN QRH FOR ON GROUND ISSUE AND ISSUE WAS RESOLVED.