As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL AT 80 KTS, RECEIVED HYD 3 LOW PRESSURE CAUTION. CONTINUED TAKEOFF, HAD A GEAR DISAGREE CAUTION THEN GEAR UNSAFE WARNING, & NOSE DOOR WARNING. AFTER ABOUT 15 SECONDS HYD PRESSURE WAS RESTORED AND WARNINGS AND CAUTIONS CLEARED. REPLACED NR 3A HYDRAULIC PUMP IAW AMM 29-12-03 AND LANDING GEAR RETRACTION/EXTENSION CHECK DONE IAW AMM 32-30-00. OPS CHECKED GOOD.