As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5544, SRQ TO IAH. AT 1,000 FT AFTER TAKEOFF, THE FLIGHT CREW RECEIVED A STALL FAIL MESSAGE ON EICAS. THE ACFT WAS LEVELED OFF AT 3,000 FT AND THE CREW HEARD A LOUD BUZZING SOUND. THE ACFT RETURNED TO SRQ AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE ACFT AND FOUND THE OXYGEN SERVICE DOOR OPEN. THE DOOR WAS INSPECTED AND CLOSED WITH NO FURTHER DEFECTS. (S)