As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT LEAK INDICATION, QRH REQUIRES, INFLIGHT SHUT DOWN OF LEFT ENGINE. DUCT LEAK LIGHT EXTINGUISHED AFTER APPROX 3 MINUTES. CHECKED ALL DUCTS FOR LEAKS ON LT SIDE. FOUND LEAKS ON FLANGE OF ''''Y'''' DUCT. ALSO COMPLIED WITH SB 120-36-0015. REPLACEMENT OF THERMAL SWITCHES ON PNEUMATIC DUCTS. OPS CK OF PNEUMATIC SYSTEM. NO LEAKS DETECTED.