As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE-FLIGHT RIGHT RAM AIR DOOR AND DEFLECTOR DOOR CLOSED. RAM DOOR FAIL OPEN LIGHT NOT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED R/H RAM AIR DOOR, OPS NML REF B737-800 AMM 21-51-21-400-801. ACCOMPLISHED PACK/ZONE TEMP CONTROL BITE TEST, OPS NML REF AMM 21-61-00-700-806-002. MAINT PROCEDURES REVERSED, REMOVED RAM AIR DOOR LOCKOUT PARTS AND STORED IN THE FLY AWAY KIT.