As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS FMC DISPLAY IS DIFFICULT TO READ IN FULL SUNLIGHT, THE MAX BRIGHT SETTING SEEMS COMPROMISED AND INADEQUATE. SEA MNT & DISPATCH NOTIFIED VIA ACARS AT 15:45Z. GROUNDED - YES. CLEANED PHOTO CELL SENSOR ON CDU. OPS NORMAL REF. B737-800 AMM 34-61-01-400-802.