What was found
LT PFD BECAME PIXELATED ON FINAL APPROACH, COMPLETLEY UNUSEABLE, RT PFD DISPLAY WERE FINE. PROBLEM CLEARED UP FEW MINUTES LATER. REMOVED AND REPLACED LT PFD IAW EA500 AMM 31-10-16. PERFORMED DISPLAY AND CONTROL PANEL ADJUSTMENT/TEST IAW AMM 31-10-00 AND TRANSPONDER SYSTEM ADJUSTMENT/TEST IAW AMM 34-50-60. ALL CHECKS GOOD. VERIFIED NR 1 AND NR 2 COMPLY WITH FAR 91.413, AND FAR 43 APPENDIX F. PERFORMED ALTITUDE REPORTING CORRELATION TEST IAW PARA.(C) OF FAR PART 43 APPENDIX E, NO DATA CORRESPONDENCE ERRORS FOUND FOR TRANSPONDER NR 1 AND NR 2.