As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE NATIONAL AIRLINES AML 44070-1: DURING TAXI, SMELLED BAD HYDRAULIC ODOR AND RETURNED TO GATE. FOUND HYDRAULIC LEAK IN SYSTEM #1 HYDRAULIC LINE, LEFT SIDE FUSELAGE AT BS 900. REPLACED SUBJECT HYDRAULIC LINE WITH TEMP "FLEXIBLE" HYDRAULIC LINE IAW B747-400 AMM 20-11-05. NO LEAKS NOTED.