As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) NR 1 ENGINE FIRST STAGE NOZZLE GUIDE VANE (NGV) BURNED THROUGH. NGV WAS LOCATED ADJACENT TO NR 9 COMBUSTION CHAMBER. SUSPECT CAUSED BY CRACKING ON THE LEADING EDGE ALLOWING HOT AIR TO PENETRATE THE NGV. FOUND DURING INSPECTION OF THE COMBUSTION CHAMBERS IAW AD/JT8D/20 (PW SB5639). (OTHER CAUSE: MATERIAL ) (CASA NR 510002077)