As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3677 - CREW REPORTED TAKEOFF DUE TO NO TORQUE PROPELLER SPEED INDICATIONS FOR THE RIGHT ENGINE. MAINTENANCE REMOVED AND REPLACED THE DIGITAL ELECTRONIC CONTROL UNIT FOR THE RIGHT ENGINE IAW SAAB MM. OPS CHECKS WERE GOOD AND AIRCRAFT WAS RETURNE TO SERVICE. (M)