As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHTT ENGINE IDG VALVE C/B POPPING. THIS IS M31 CB(28VDC). IT IS CHRONIC AND MEL 7521D CANNOT BE USED TO DF THE RIGHT IDG VALVE, DUE TO STATING AFTER DEACTIVATION OF THE VALVE PUSH THE C/B IN. THIS ITEM NEEDS TO BE FIXED OR PROVISION OF MEL GET CHARGED. REPLACED GCU NR 2; RIGHT ENGINE, OPS CHECK GOOD.