As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT DUCT LEAK LIGHT CAME ON IN FLIGHT. LIGHT EXTINGUISHED AFTER 4 MINUTES. RETURNED TO LAX. INSPECTED LEFT ENGINE BLEED AIR DUCTS FOR LEAKS. FOUND WEEP HOLE FOR VENTURI ON BOTTOM AND CLAMP LEAKING. REPOSITIONED WEEP HOLE FOR VENTURI ON TOP AND TIGHTENED CLAMP NEXT TO PRESSURE REGULATOR. RAN BLEED SYSTEM TO CHECK FOR LEAKS. NONE FOUND, NO DUCT LEAK INDICATION.