As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/TPA - FLT 6681 - DURING CRUISE AT 0720 HOURS ON 2-8-98, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO RT AOA STALL VANE HEAT FAILED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND RESET RT AOA CIRCUIT BREAKER. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)