As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAT INFLIGHT T9647/22SEP. CREW REPORTED SMOKE IN CABIN DURING CLIMB. RETURNED TO SAT AND LANDED WITHOUT INCIDENT. SMOKE CLEARED AFTER LANDING. ACCOMPLISHED BURN OUT OF LT AND RT HAND HIGH PRESSURE PNEUMATIC DUCTS. SYSTEM GROUND CHECKED NORMAL OPS.