What was found
(CAN) DEICE PRESS CAUTION LIGHT CAME ON DURING FLIGHT. AIR TURN BACK PERFORMED. CDS SHOWS LOW PRESS 4B. DDV#4 REPLACED. AIRCRAFT RETURNED TO SERVICE. (TC# 20190614016)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) DEICE PRESS CAUTION LIGHT CAME ON DURING FLIGHT. AIR TURN BACK PERFORMED. CDS SHOWS LOW PRESS 4B. DDV#4 REPLACED. AIRCRAFT RETURNED TO SERVICE. (TC# 20190614016)