What was found
SEVERAL GOUGES ON FORWARD COMPARTMENT COOLING DUCT INSIDE NR 1 OUTBOARD THRUST REVERSER AT NR 1 ENGINE, (NR 1 OUTBOARD THRUST REVERSER UPPER COOLING DUCT). REMOVED DUCT, REPAIRED IAW EA 8-7830-77634, AND DC10 SRM 51-21-01 VOL 2, AND REINSTALLED IAW DC10 MM 20-50-02. REFERENCE NON-ROUTINE N00929.