As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE DRIVE LIGHT NOT ILLUMINATED DURING PRE FLT. FOUND VERY HIGH RESISTANCE AT PIN 5 AND 6 ON PLUG DP 1306 ON NR 1 IDG PRESS A/W REF SSM 24 11 11. REMOVED AND REPLACED NR 1 ENG IDG PER AMM 24 11 11. IDG OPERATIONAL CHECKED GOOD PER AMM 24 11 11.