Helicopter flight crew not abiding by LOA with cvg approach control used discrete code which caused a data block overlap with an small transport inbound to a satellite airport. Small transport took avoidance evasive action when controller issued the helicopter traffic to the small transport. Controller reporter would like to see the helicopter discrete code canceled until its company complies with the LOA.

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Attributes
ACN	320861
Time
Date	199511
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cvg airport : isz
State Reference	OH
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach descent other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Helicopter
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller radar : 16
ASRS Report	320861
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Helicopter company has an LOA with cvg to squawk a specified code while delivering passenger to and from indiana. This discrete code automatically acquires a tag, which radar position do not have control of. The problem exists now that the helicopter is flying all around cvg airspace on discrete code for purposes other than stated in the LOA. This causes unnecessary clutter on the radar scope. The company of the helicopter has been asked on several occasions to comply with the LOA, and when not delivering passenger to and from indiana, to squawk 1200, but the problem still persists. While the C421 was on an NDB runway 24 approach to isz, the helicopter tag acquired, and the data blocks overlapped. Due to the inability to move or adjust the helicopter's data block, I could not immediately determine the helicopter's altitude. I advised the C421 of traffic, he saw the helicopter and turned to avoid collision. I would like to see the discrete code removed from cvg ARTS until the helicopter complies with the LOA. Clutter from the helicopter's ARTS tag has caused problems in the past, and supervisors at cvg have been advised of this problem.

Original NASA ASRS Text

Title: HELI FLC NOT ABIDING BY LOA WITH CVG APCH CTL USED DISCRETE CODE WHICH CAUSED A DATA BLOCK OVERLAP WITH AN SMT INBOUND TO A SATELLITE ARPT. SMT TOOK AVOIDANCE EVASIVE ACTION WHEN CTLR ISSUED THE HELI TFC TO THE SMT. CTLR RPTR WOULD LIKE TO SEE THE HELI DISCRETE CODE CANCELED UNTIL ITS COMPANY COMPLIES WITH THE LOA.

Narrative: HELI COMPANY HAS AN LOA WITH CVG TO SQUAWK A SPECIFIED CODE WHILE DELIVERING PAX TO AND FROM INDIANA. THIS DISCRETE CODE AUTOMATICALLY ACQUIRES A TAG, WHICH RADAR POS DO NOT HAVE CTL OF. THE PROB EXISTS NOW THAT THE HELI IS FLYING ALL AROUND CVG AIRSPACE ON DISCRETE CODE FOR PURPOSES OTHER THAN STATED IN THE LOA. THIS CAUSES UNNECESSARY CLUTTER ON THE RADAR SCOPE. THE COMPANY OF THE HELI HAS BEEN ASKED ON SEVERAL OCCASIONS TO COMPLY WITH THE LOA, AND WHEN NOT DELIVERING PAX TO AND FROM INDIANA, TO SQUAWK 1200, BUT THE PROB STILL PERSISTS. WHILE THE C421 WAS ON AN NDB RWY 24 APCH TO ISZ, THE HELI TAG ACQUIRED, AND THE DATA BLOCKS OVERLAPPED. DUE TO THE INABILITY TO MOVE OR ADJUST THE HELI'S DATA BLOCK, I COULD NOT IMMEDIATELY DETERMINE THE HELI'S ALT. I ADVISED THE C421 OF TFC, HE SAW THE HELI AND TURNED TO AVOID COLLISION. I WOULD LIKE TO SEE THE DISCRETE CODE REMOVED FROM CVG ARTS UNTIL THE HELI COMPLIES WITH THE LOA. CLUTTER FROM THE HELI'S ARTS TAG HAS CAUSED PROBS IN THE PAST, AND SUPVRS AT CVG HAVE BEEN ADVISED OF THIS PROB.

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.