As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON DEPARTURE THE AIRCRAFT EXPERIENCED A COMPRESSOR STALL ON NR 2 ENGINE. THE CREW DECISION WAS MADE TO RETURN TO POINT OF DEPARTURE. MAINTENANCE INVESTIGATION FOUND THE PS3 SENSE LINE FILTER BLOCKED WITH WHAT APPEARED TO BE SHREDDED PAPER FIBRE, ORIGIN UNKNOWN. THE FILTER WAS CLEANED AND THE AIRCRAFT GROUND RUN SUCCESSFULLY BEOFRE RETURN TO SERVICE.