As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER START OF ENGINES, TURNING ON THE STANDBY HYDRAULIC PUMP IT SHOWED NO PRESSURE. TEST FOR RELEASE ACCORDING TO MEL FOR INDICATION FAILURE PERFORMED AND THE RESULT CLEARLY SHOWED THAT THE PUMP WAS U/S. THE HYDRAULIC STANDBY POWER UNIT (SPU) WERE REPLACED ACCORDING AMM 29-11-36.