What was found
(CAN) ON TAXI OUT, 'A' SYSTEM HYDRAULIC PRESSURE AND QUANTITY DROPPED TO "0". RUDDER POWER CONTROL UNIT (PCU) REPLACED. THE METAL COVER ASSEMBLY BROKEN AND PLUGS P/N 69-54775-1 EXPOSED PERMITTING FLUID LOSS. REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) ON TAXI OUT, 'A' SYSTEM HYDRAULIC PRESSURE AND QUANTITY DROPPED TO "0". RUDDER POWER CONTROL UNIT (PCU) REPLACED. THE METAL COVER ASSEMBLY BROKEN AND PLUGS P/N 69-54775-1 EXPOSED PERMITTING FLUID LOSS. REPLACED.