As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START NR 1 TAI VALVE LIGHT TURNED AMBER WITH ENGINE ANTI-ICE SWITCH OFF AND BLUE VALVE POSITION LIGHT BRIGHT. LIGHTS EXTINGUSHED AFTER ENGINE SHUTDOWN. MANUALLY OPEN & CLOSED NR 1 ENG TAI, ALL INDICATIONS NORMAL, R & R IAW AMM 30-21-11-401. OPS & LK CK GOOD.