As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, TURNED ON THE ENGINE A/I ( HIGH POWER SETTING) AND GOT AN AMBER TAI ON THE #2 ENGINE AS WELL AS THE "COWL VALVE OPEN" BLUE LIGHT REMAINED BRIGHT BLUE. CYCLED SEVERAL TIMES AT DIFFERENT ALTITUDES BUT INDICATIONS REMAINED. AT LEVEL OFF W/ REDUCED (CRUISE) POWER, VALVE FUNCTIONAL/WORKED NORMALLY. GROUNDED - YES. PER B737-800 AMM 30-21-11 REMOVED AND RE-INSTALLED #2 ENGINE COWL TAI VALVE. PER AMM 71-00-00-800-807-FOO #2 ENGINE IDLE RUM. TEST #2 ENGINE COWL TAI VALVE GOOD.