As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS THAT THE GEARS WOULD NOT RETRACT AFTER SEVERAL ATTEMPTS WITH A CYAN PSEU FAULT FOLLOWED BY AN AMBER GEAR DISAGREE CAS MESSAGE. TECHS PUT AC ON JACKS AND ATTEMPTED TO SWING GEAR. UPON GEAR UP SELECTION, THE PROX SYS FAULT CYAN CAS POSTED AND THE GEAR DID NOT COME UP. MDC CURRENT FAULTS SHOWED THE PSEU SYSTEM FAILURE. ADVANCED DIAGNOSTICS SAID PSEU INTERNAL FAILURE. INSTALLED NEW PSEU AND OPS CHECK NORMAL.