As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING MESSAGE AFTER DEPARTURE. UPON LANDING GEAR EXTENDED NORMALLY. EMERGENCY DECLARED. (FLT 5151) REMOVED AND REPLACED PSEU IAW AMM. PERFORMED PSEU OPS CHECKS AND OPS CHECK GOOD. PERFORMED NLG SWINGS AND OPS CHECK GOOD. CHECKED GAPS OF NLG PROX SENSORS AND OPS CHECK GOOD. HYD SYSTEM NR 3 PRESSURE, QTY, AND TEMP READ NORMAL.