As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH FL 280, A THUMP WAS FELT THROUGH AIRFRAME AND THE MWS LIGHT FAULT LIGHT ILLUMINATED BRIEFLY. AIR RETURN TO MSP. MAINTENANCE COMPLETED 409 204198 DOWNLOAD OF FDAMS SHOWED NR 2 ENGINE COMPRESSOR STALL, NR 2 ENGINE BLEED BAND ACTUATOR AND HMU WERE REPLACED WITH SERVICEABLE PARTS. BOTH OPS CHECKED GOOD REFER TO WORK CARD FOR DETAILS.