What was found
EXTREMELY LOUD NOISE AFTER TAKEOFF WITH STALL FAIL CAUTION MESSAGE FLIGHT 4291 - FILED OPEN PLEASE REFERENCE AML 430131. FOUND THE OXY DOOR OPEN WHEN THE AIRCRAFT TAXIED BACK TO THE GATE. DUE TO THE DISRUPTION OF THE AIR FLOW FROM THE OXY DOOR. PERFORMED STALL PROTECTION SYSTEM FAULT ISOLATION TROUBLESHOOTING PER CRJ200 FIM. FOUND NO PROBLEM WITH THE SYSTEM AT THIS TIME. RECORDED ALL INFORMATION OF THE MDC ON THE STALL FAIL LOG FORM.