What was found
DURING DECENT GSD FAIL 1,2 AND 3 DISPLAYED ALONE WITH MULTIPLE CORRESPONDING SYSTEM, FAILURE MESSAGES. AVIONICS INTEGRATION (IAC, NIC PROC, MAU, GEA, IAPS): DURING A GSD FAILURE WE GOT A GTC MESSAGE OF L PFD CARD3 ERROR AND ALSO L PFD CARD3 REM REMOVED "SUSPECTED" DEFECTIVE LH PFD W / NO DEFECTS. INSTALLED CUSTOMERS SUPPLIED NEW LH PFD. SECURED ALL CONNECTIONS AND PFD W/ NO DEFECTS. POWERED ON AIRCRAFT, PERFORMED REQUIRED SOFTWARE UPLOADS W/ NO DEFECTS. PEREFORMED REQUIRED OPS CHECKS W/ NO DEFECTS. REF I/A/W CE-700 AMM 42-20-25 / 42-10-00,