What was found
ON FINAL APPROACH PLACED THE GEAR HANDLE TO DOWN POSITION. RECEIVED GEAR DISAGREE EICAS. RT GEAR DID NOT EXTEND. ACCOMPLISHED ALT GEAR EXT CHKLST. RIGHT GEAR CAME DOWN NORMALLY. FOUND NR 7 TIRE BLEWOUT CAUSE DAMAGE OF HYDRAULIC LINES NEAR CEILING ARE ABOVE RT MAIN LANDING GEAR. FOUND R GEAR TILT PRESSURE SWITCH CANNON PLUG BROKEN. REMOVED AND REPLACED CANON PLUG D3208 IAW SWPM 20-61-11. REMOVED AND REPLACED 3 EA HYDRAULIC LINES THAT WERE DAMAGED IPC REF 32-32-51-16 ITEMS 680,550, AND 705. NO OTHER BROKEN OR DAMAGED LINES NOTED UPON CLOSE INSPECTION. PERFORM MAIN LANDING GEAR EXTENSION AND RETRACTION CHK, REF AMM 33-32-00 AND ECRA 3232-01115 OPS CHK GOOD NO FAULT NOTED.