As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RUNNING ON THE PLATFORM. THE NR 2 HYDRAULIC FAILED WHILE THE AIRCRAFT WAS ON THE PLATFORM, MAINTENANCE WAS NOTIFIED. THE MECHANIC REMOVED AND REPLACED THE NR 2 HYDRAULIC PUMP DUE TO A SHEERED SHAFT, GROUND RUN WAS PERFORMED AND AIRCRAFT WAS RETURNED TO SERVICE.(K)