As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 3884 - PILOT REPORTED SMOKE HAD ACCUMULATED IN THE COCKPIT, THE AIRCRAFT LANDED AT IAH WITHOUT ANY FURTHER INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE RAM AIR DOOR SWITCH IN THE WRONG POSITION AND TWO WORM GEAR CLAMPS BROKEN ON THE LEFT PACK. THE AFFECTED CLAMPS WERE REPLACED AND THE AIRCRAFT OPERATIONALLY CHECKED GOOD AND WAS RELEASED TO SERVICE. (X)