What was found
DURING C-CHECK, INSPECTION REPORTED IDG (INTERGRATED DRIVE GENERATOR) WIRE BUNDLE DAMAGE ON BOTH ENGINES. WIRE BUNDLE ID IS W0623 (P/N 420990 / 50U629). ALSO REF AMM 73-21-73. *S/D* ANALYSIS REVEALED CONTRIBUTING DAMAGE WAS RESULT OF VIBRATION AND ENGINE BLEED AIR HEAT IN COMBINATION WITH ROUTING OF THE WIRE BUNDLE. BOEING AND PRATT AND WHITNEY WERE NOTIFIED AND THEY ARE LOOKING AT A PERMANENT FIX FOR THE PROBLEM. THE DAMAGED WIRE BUNDLES WERE REPAIRED USING STANDARD REPAIR PROCEDURES. A FLEET INSPECTION IS UNDERWAY TO DETERMINE THE EXTENT OF THE PROBLEM AND TO REPAIR AS NECESSARY.