What was found
FLT # 2257, LGA-DEN. DURING DECENT PASSING APPRX 20000 FT EXPRIRENCE A MASSIVE SPARK WITHIN ASSOICTAED LOUD POP. ON THE FO SIDE UNDERNIHT THE OPENING PORTION OF THE FO RIGHT WINDOW , APPORX ILLUMIATION 1 AND HALF FEET LONG AND THEN A SECOND GRAPFURIT SIZE SPARK IN THE SAME LOCATION (ABOVE THE CH/ VOULUME AGENT TO NWS HANDLE ) . APPORXMETLY 2 MIN LATER WITH AN ECAM "ANTI ICE RIGHT WINSHIELD " . THE ASS W14 "WINDOWS R " CB DID NOT POPPED . ; INSPECTED RH SLIDE WINDDOW REF AMM 56-12-11 / NO DAMAGED NOTED. / UPON INSPECTION FOUND RH WINDOW HEAT CORD 1 AREA 0 .25 INH. INSULATION MISSING / TEMP. REPAIRED IAW ARIBUS ESPM 20-53-29 .