CRJ200 flight crew has access door open in flight; diverts for landing.

Attributes
ACN	721690
Time
Date	200612
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ind.airport
State Reference	IN
Altitude	msl single value : 21000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Plan	IFR
Aircraft 2
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 200 flight time total : 4500
ASRS Report	721690
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 200 flight time total : 5600
ASRS Report	721690
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Aircraft Company
Primary Problem	Aircraft

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.

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.