As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ATC CLEARED FLIGHT TO CLIMB FROM FL 370 TO FL 380. DURING CLIMB, CREW HAD AN UN-COMMANDED SPEED CHANGE FROM .77 TO .64. SELECTED MANAGED SPEED & INPUT .77. RESOLUTION IAW COMMENTS IN TROUBLESHOOTING DVDR DATA & HISTORY DATA LOAD, NO FAULTS. DATA SENT TO FLEET FOR PERFORMANCE ENGINEERING, NO FURTHER ACTION REQUIRED.