As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED, ON FINAL APPROACH THE A/C FILLED WITH SMOKE. SKYDROL INDUCED INTO THE PNEUMATIC SYSTEM DUE TO CHAFED LINE AND DUCT. FOUND PNEUMATIC LINE CHAFING AGAINST EDP HYD LINE IN L/E ABOVE NR 3 ENGINE. REPAIRED PNEUMATIC DUCT IAW FAA FORM 8130-3. DUCT WAS REWELDED, INSTALLED INTERM REPAIR PER GMM 3-24-2.