What was found
DURING ENGINE RUNS, AFTER NR 1 ENGINE CHANGE, IDG WOULD NOT PRODUCE POWER, NO INDICATIONS. ACFT GROUNDED. REMOVED NR 1 ENGINE IDG IAW MM 24-11-11-800-801. METAL CONTAMINATION FOUND IN NR 1 IDG. FLUSHED NR 1 IDG OIL COOLING CIRCUIT IAW AMM TASK 24-11-11-090-801, C3, STEP 1(C) 1). INSTALLED NR 1 IDG IAW MM 24-11-11-400-801, STEP 3 A-I. OPS AND LEAK CHECKED GOOD. REPLACED NR 1 IDG AIR/OIL COOLER IAW AMM TASK 24-11-21-400-801, STEPS 3A THROUGH I. LEAK CHECKED GOOD. REPLACED NR 1 IDG OIL COOLER IAW AMM 73-11-06, STEP A-G. LEAK CHECKED GOOD.