As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT LEAKAGE LIGHT ILLUMINATED IN FLIGHT NR 1 ENGINE. LEFT ENGINE SHUT DOWN. RETURNED TO SBA. LIGHT EXTINGUISHED UPON ENGINE SHUT DOWN. REMOVED AND REPLACED LEFT DEICE PRESSURE REGULATING VALVE WITH A SERVICEABLE ONE IAW EMB 120 MM CH 30-10-06.