As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL TO TPA - AFT AVIONICS SMOKE WARNING ACTIVATED. WARNING ACTIVATED AGAIN AT NR 2 ENG SHUT DOWN AND WHEN EXTERNAL A/C POWER APPLIED. NO OTHER SMOKE/HEAT/FIRE WARNINGS. INITIALLY ITEM WAS DEFERRED PER MEL 25-27-03. REPLACED AFT RACK COOLING FAN ASSY PER AMM 23-39-00.