As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED PNEUMATIC PRESSURE LOW. DID NOT GET ABOVE 15PSI. MAINTENANCE FOUND LT BLEED LINE PN 129-970040-1, FEEDING REGULATOR CHAFED THROUGH/LEAKING DUE TO CORROSION FOUND ON AREAS OF THE LINE AND CLAMPS. SERVICEABLE LINE/CLAMPS INSTALLED & CHECKED SERVICEABLE. ACFT WAS RETURNED TO SERVICE.