What was found
WEATHER RADAR WILL NOT DISPLAY OR TEST ON FIRST OFFICER NAV DISPLAY(<P>PLACED ON MEL 34-43-01, CAT D, DUE ON 03 DEC 21, MDDR 151328</P> / <P>LP1370587 ITEM 4 05 AUG 21 TROUBLESHOT PER FIM 34-22 FT 808 - REMOVED AND REPLACED EFIS CONTROL PANEL IAW AMM 34-22-02 CHECKS GOOD NOTIFIED MCC - PLACARDS REMOVED. THIS CLEARS MDDR 151328.</P>)