As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG IDG DRIVE LIGHT INOP, IDG OIL LEVEL BLANK AND NO AMBER INDICATION ON SYNOPTIC. FOUND WIRE HARNESS W0623 CHAFFED AT SEVERAL CLAMP LOCATIONS. REPLACED WIRE HARNESS AND OIL LEVEL INDICATION REMAINED BLANK. FOUND IDG INTERNAL CHARGE PRESSURE SWITCH FAILED OPEN AT PINS 10 AND 11 CONNECTOR DM24001C. REPLACED IDG.