As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, HYD LT CWP LIGHT ILLUMINATED. CREW DISCUSSED THE ISSUE & RETURNED TO BASE & SWAPPED PLANES. UPON TROUBLESHOOTING, MAINTENANCE DISCOVERED THE FLAP ACCUMULATOR TO HAVE AN INTERNAL LEAK. ACCUMULATOR WAS REPLACED. OPERATIONS CHECKED SATISFACTORILY PERFORMED.