As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 IDG LOW OIL PRESSURE. RTFL (TWICE). CFDS FAULT SHOWED IDG1 OIL PRESSURE AND CHECK GCU C2 TO C4 AND IDG B12 TO B14. WIRING CHECKED GOOD. SUSPECT IDG FAILED. REPLACED NR 1 ENG IDG, OPS NORMAL. REPLACED CARBON SEALS. NO LEAKS AFTER ENG RUN.