As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE COWL VALVE OPEN LIGHT (BLUE) FLICKERS ON AND OFF IN TURBULENCE. VALVE FUNCTIONED NORMALLY WHEN IN THE ON OR OFF POSITION. ACFT GROUNDED. INSPECTED, CLEANED, & REPLACED THE BULBS IN COWL VALVE OPEN LIGHT. INSPECTED THE NR 1 ENGINE COWL VALVE & CLEANED CONNECTORS. NO ISSUES NOTED, NR 1 ENGINE COWL VALVE OPS NORMAL IAW AMM 30-21-00. OK FOR SERVICE.