As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WAITING FOR CLEARANCE FOR T/O, SMELLED A VERY BAD ODOR FOLLOWED BY THE HYD PRESS B LOW AND THE HYD PUMP B-SYSTEM FAIL, THEN THE RUDDER STANBY SYSTEM FAIL LIGHT. LEAKING APPEARED TO COMING FROM THE PYLON AREA. ITEM IS UNDER INVESTIGATION.