As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 946 - SHORTLY AFTER TAKEOFF, NR 3 AIR SYSTEM DIFFERENTIAL MESSAGE ILLUMINATED. NR 3 BLEED AIR PRESSURE OFF LIGHT ALSO ILLUMINATED. LANDED DFW WITHOUT FURTHER INCIDENT. REPLACED NR 3 INBOARD DUCT. LEAK CHECKS GOOD. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)