Narrative:

Climbing out of ord we heard a humming noise. At about FL210 the noise became a very high pitch squeal. We decided it was the communication door left open. After trying to call company several times by radio; we made the decision to divert to the nearest airport; which was ind and fix the problem. Landed without any problem on runway 23R; taxied to the gate and had the problem fixed.

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Original NASA ASRS Text

Title: CRJ200 FLT CREW HAS ACCESS DOOR OPEN IN FLT; DIVERTS FOR LNDG.

Narrative: CLBING OUT OF ORD WE HEARD A HUMMING NOISE. AT ABOUT FL210 THE NOISE BECAME A VERY HIGH PITCH SQUEAL. WE DECIDED IT WAS THE COM DOOR LEFT OPEN. AFTER TRYING TO CALL COMPANY SEVERAL TIMES BY RADIO; WE MADE THE DECISION TO DIVERT TO THE NEAREST ARPT; WHICH WAS IND AND FIX THE PROB. LANDED WITHOUT ANY PROB ON RWY 23R; TAXIED TO THE GATE AND HAD THE PROB FIXED.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.