As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN DUE TO LOSS OD BOTH PRESS CONTROLLERS, PERFORMED QRH 21.9 - 21.2. R & R NR 2 MOTOR ASSEMBLY ACTUATOR IAW AMM 21-32-05. R & R NR 1 & 2 CABIN PRESS CONTROLLERS IAW AMM 21-32-03. LEAK CHECK COMPLIED WITH IAW AMM 34-11-00. OPERATIONS CHECKED NORMAL.