As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DEPARTURE THE CREW NOTICED EXCESSIVE DUCT PRESSURE AND A DROP OF E.P.R. ON #3 ENGINE, THE AIRCRAFT DIVERTED. POST FLIGHT MAINTENANCE TROUBLE SHOOTING REPLACED THE FUEL CONTROL UNIT; PRESSURE RATIO BLEED CONTROL VALVE AND THE START BLEED CONTROL VALVE. A BOROSCOPE INSPECTION WAS CARRIED OUT AND THE AIRCRAFT RETURNED TO SERVICE.