As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT RAM AIR DOOR FULL OPEN (BLUE) LIGHT ILLUMINATED AT CRUISE FL 340. NOTICED IT ABOUT ONE HOUR AND 30 MINUTES INTO THE FOUR HOUR THIRTY SEVEN MINUTE FLIGHT. REMAINED ILLUMINATED ALL FLIGHT. GROUNDED - YES. COULD NOT DUPLICATE. ACCOMPLISHED B737-900 FIM 21-51 TASK 803. FOUND TO BE AN INTERMITTENT FAULT.