As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O DURING GEAR RETRACTION RECEIVED GEAR DISAGREE WARNING FOLLOWED BY HYD 3 LOW PRESS CAUTION. FLUID QTY IN HYD SYS #3 AT 0 AFTER GEAR RETRACTION. / FOUND HYDRAULIC FLUID LEAKING FROM RT MLG ASSY LOWER HOSE, REMOVED AND REPLACED HOSE IAW CRJ7 AMM 32-11-12-000/400-812 LEAK CHECK GOOD.