As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1145 - EN ROUTE DFW-SFO, AIRCRAFT ON CLIMB-OUT, EMITTED SMOKE AND FUMES FROM AIRCRAFT GASPERS THROUGHOUT THE PLANE. SMOKE STOPPED AFTER APPROXIMATELY 5 MINUTES. RETURNED DFW AND LANDED WITHOUT INCIDENT. REPLACED RIGHT AIR CONDITIONING PRESSURE REGULATOR VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)