What was found
NR 1 ENGINE FAILED IN-FLIGHT. INVESTIGATION AND TROUBLESHOOTING INDICATED THAT THE OVERSPEED BOX FAILED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 1 ENGINE FAILED IN-FLIGHT. INVESTIGATION AND TROUBLESHOOTING INDICATED THAT THE OVERSPEED BOX FAILED.