As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT IDG VALVE STATUS MSG ILLUMINATED DURING TAXI MOMENTARILY CLEARED AND ILLUMINATED RETURNED TO GATE. VERIFIED IDG VALVE OPEN PER MEL FWD TO MCO AND PLAC PER MEL 75-21-01C. REPLACED NR 1 ENG IDG PER MM. OPS AND LEAK CKS OK. INDICATION NORMAL REMOVED MCO AND PLACARD.