As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE TAI ILLUMINATED, AMBER DEPARTING DCA IN LIGHT SNOW CONDITIONS. ASSOCIATED COWL LIGHT WAS PROPERLY ILLUMINATED DIM BLUE. CYCLING THE SWITCH HAD NO EFFECT, AND TAI INDICATION WENT FROM GREEN TO AMBER TO OFF AND BACK TO AMBER SEVERAL TIMES BY ITSELF DURING CLIMBOUT. ACFT GROUNDED. R & R NR 2 ENG COWL TAI VALVE IAW AMM 30-21-11. OPS AND LEAK CHECK GOOD.