As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO DURING TAXING, THE EICAS MESSAGE WXR FAIL WAS SHOWN; MAINTENANCE PERSONNEL PERFORMED INSPECTION DETECTING MBA 4A MOUNTING TRAY FAILED IAW AMM 34-42; SO THE WEATHER RADAR R/T MOUNT WAS REPLACED P/N: 2041213-0413 S/N: MBA4A-08195 IAW AMM 34-43, TESTED CORRECT.