What was found
DRIVE LIGHT ON NR 1 GENERATOR ILLUMINATED INFLIGHT. DISCONNECTED IDG IAW QRH. ACFT GROUNDED. FOUND METAL CONTAMINATION IN THE NR 1 IDG OIL FILTER. REMOVED THE NR 1 IDG, IDG AIR-OIL COOLER AND IDG OIL COOLER IAW 24-11-11-000-801, 24-11-21-000-801 AND 73-11-06-000-801-F00. FLUSHED THE NR 1 ENGINE PLUMBING LINES IAW AMM 24-11-11-090-801C3. INSTALLED NR 1 IDG IAW AMM 24-11-11-400-801, STEPS 3A TO 3G, 10, AND STEP 3J, AIR-OIL COOLER IAW AMM 24-11-21-400-801 STEPS 3A TO 3G, 2 AND NR 1 IDG OIL COOLER IAW AMM 73-11-06-400-801-F00. PERFORMED NR 1 ENGINE IDLE LEAK CHECKS IAW AMM 71-00-00-700-801-F00 AND OPS TEST OF NR 1 IDG IAW AMM 24-11-00-700-802. OPS CHECKED OK, LEAK CHECKED OK FOR NR 1 IDG, IDG AIR-OIL COOLER, AND IDG OIL COOLER. GROUND VERIFICATION CHECKED GOOD.