As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START LT ENGINE AMBER COWL A/I VALVE CAME ON AFTER START, THEN EXTINGUISHED. LIGHT AGAIN CAME ON ON TAXI OUT. RAN QRH CALLED MAINTENANCE CONTROL. ACFT GROUNDED. IAW AMM 30-21-21, REPLACED NR 1 ENG TAI PRESSURE SENSOR. RAN NR 1 ENG AT T/O POWER, 4 CYCLES W/NO ANTI-ICE FAULTS INDICATED.