A CL65 on approach to a parallel runway to that of an unseen C152 makes a missed approach for anothe...

Attributes
ACN	508500
Time
Date	200104
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : isp.airport
State Reference	NY
Altitude	agl single value : 600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : isp.tower
Make Model Name	Cessna 152
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	508500
Events
Anomaly	conflict : airborne critical
Resolutory Action	controller : issued advisory flight crew : took evasive action flight crew : executed missed approach
Miss Distance	horizontal : 600 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On final to runway 33L at isp, approach advised us of cessna traffic to runway 33R. We never saw the cessna. Our TCASII indicated traffic less than 1/4 mi laterally and 300 ft below us. Vertical separation decreased to 200 ft, 100 ft and zero. TCASII traffic symbol touched our airplane symbol with range set to 5 mi. Tower asked cessna if he had us in sight. He did not, and we never saw him. We initiated go around and flew a visual pattern returning to land on runway 33L.

Original NASA ASRS Text

Title: A CL65 ON APCH TO A PARALLEL RWY TO THAT OF AN UNSEEN C152 MAKES A MISSED APCH FOR ANOTHER TRY AT ISP, NY.

Narrative: ON FINAL TO RWY 33L AT ISP, APCH ADVISED US OF CESSNA TFC TO RWY 33R. WE NEVER SAW THE CESSNA. OUR TCASII INDICATED TFC LESS THAN 1/4 MI LATERALLY AND 300 FT BELOW US. VERT SEPARATION DECREASED TO 200 FT, 100 FT AND ZERO. TCASII TFC SYMBOL TOUCHED OUR AIRPLANE SYMBOL WITH RANGE SET TO 5 MI. TWR ASKED CESSNA IF HE HAD US IN SIGHT. HE DID NOT, AND WE NEVER SAW HIM. WE INITIATED GAR AND FLEW A VISUAL PATTERN RETURNING TO LAND ON RWY 33L.

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.

A CL65 on approach to a parallel runway to that of an unseen C152 makes a missed approach for another try at isp, ny.