What was found
#1 COWL VALVE OPEN LIGHT IS BRIGHT BLUE WITH SWITCH IN OFF POSITION. GROUNDED - YES. REMOVED AND REPLACED #1 ENG TAI VALVE REF B737-800 AMM 30-21-11-400-801 OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
#1 COWL VALVE OPEN LIGHT IS BRIGHT BLUE WITH SWITCH IN OFF POSITION. GROUNDED - YES. REMOVED AND REPLACED #1 ENG TAI VALVE REF B737-800 AMM 30-21-11-400-801 OPS CHECK GOOD.