Air carrier X TCASII RA with helicopter while on final approach. Evasive action taken go around.

Attributes
ACN	268299
Time
Date	199404
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : cmh
State Reference	OH
Altitude	agl bound lower : 1000 agl bound upper : 1000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tower : cmh tracon : clt
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : missed approach
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Helicopter
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 5000 flight time type : 10
ASRS Report	268299
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : clearance non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X on ILS approach to runway 10R at cmh. TCASII target appeared at approximately airport location. At 700 ft differential TCASII still yellow warning. At 600 ft differential we received an RA to climb. We executed a missed approach meeting the climb rate required by the TCASII. We queried the approach control. He stated that the police helicopter frequently crosses the path. At the very least that kind of information should be on the commercial chart page for the airport. The police should be required to notify the tower controller due to the simple fact that had we not had TCASII the possibility of a midair exists.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH HELI WHILE ON FINAL APCH. EVASIVE ACTION TAKEN GAR.

Narrative: ACR X ON ILS APCH TO RWY 10R AT CMH. TCASII TARGET APPEARED AT APPROX ARPT LOCATION. AT 700 FT DIFFERENTIAL TCASII STILL YELLOW WARNING. AT 600 FT DIFFERENTIAL WE RECEIVED AN RA TO CLB. WE EXECUTED A MISSED APCH MEETING THE CLB RATE REQUIRED BY THE TCASII. WE QUERIED THE APCH CTL. HE STATED THAT THE POLICE HELI FREQUENTLY CROSSES THE PATH. AT THE VERY LEAST THAT KIND OF INFO SHOULD BE ON THE COMMERCIAL CHART PAGE FOR THE ARPT. THE POLICE SHOULD BE REQUIRED TO NOTIFY THE TWR CTLR DUE TO THE SIMPLE FACT THAT HAD WE NOT HAD TCASII THE POSSIBILITY OF A MIDAIR EXISTS.

Data retrieved from NASA's ASRS site as of July 2007 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.