As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PRIOR TO TOP OF DESCENT FLIGHT CONTROL B LOW PRESSURE LIGHT ILLUMINATED; NOTICED NO HYDRAULIC SYSTEM B ABNORMALITIES. FOLLOWED QRH AND SWITCHED TO STANDBY RUDDER<[01] ACCOMPLISHED FIM 27-21 TASK 814 WITH NO DEFECTS NOTED AND OPS CHECKS GOOD. NO 10 DAY HISTORY; AC OK FOR SERVICE