As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE IDG REQUIRES FREQUENT SERVICING. ACFT GROUNDED. PERFORMED THE NR 1 ENGINE IDG STATIC LEAK CHECK IAW AMM 24-11-00. FOUND NO EXTERNAL LEAKS OF THE NR 1 IDG IAW. REPLACED THE IDG VENT VALVE ASSY, AND ALSO SERVICE FITTING IAW AMM 24-11-00. LEAK CHECK GOOD AT THIS TIME.