As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/PVD - FLT 6217 - DURING TAXI AT 1720 HRS ON 3-30-97, AIRCRAFT RETURNED TO GATE DUE TO VOLTAGE/AMPMETER FAILED AND AHRS FAILED DURING NR 2 ENGINE START. MAINTENANCE INSP AND RESET BOTH PDU'S, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)