B190 questions isp local controller about crossing cessna on 2 mi final for landing.

Attributes
ACN	517307
Time
Date	200107
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : isp.airport
State Reference	NY
Altitude	msl bound lower : 1300 msl bound upper : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : isp.tower tracon : o90.tracon
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : isp.tower
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller limited radar : 6 controller time certified in position1 : 8
ASRS Report	517307
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	controller : issued advisory flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 3000 vertical : 400
Supplementary
Problem Areas	Airspace Structure ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Isp tower was non radar. Traffic watch cessna eastbound along sunrise highway. Approach xferred communication of B190 5 mi final. I was on the line coordinating with N90. I cleared B190 to land. He came back and said 'what is this cessna doing?' at that time, B190 was at 1700 ft and cessna 1300 ft, crossing in front. I told B190 about the cessna and he continued his approach.

Original NASA ASRS Text

Title: B190 QUESTIONS ISP LCL CTLR ABOUT XING CESSNA ON 2 MI FINAL FOR LNDG.

Narrative: ISP TWR WAS NON RADAR. TFC WATCH CESSNA EBOUND ALONG SUNRISE HWY. APCH XFERRED COM OF B190 5 MI FINAL. I WAS ON THE LINE COORDINATING WITH N90. I CLRED B190 TO LAND. HE CAME BACK AND SAID 'WHAT IS THIS CESSNA DOING?' AT THAT TIME, B190 WAS AT 1700 FT AND CESSNA 1300 FT, XING IN FRONT. I TOLD B190 ABOUT THE CESSNA AND HE CONTINUED HIS APCH.

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.