Near midair collision. A B757-200 flight takes evasive action climb in response to a TCASII RA from an aircraft that overshot its assigned altitude during climb 50 mi ssw of jfk, ny.

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Attributes
ACN	523684
Time
Date	200108
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : camrn
State Reference	NY
Altitude	msl bound lower : 9000 msl bound upper : 9700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc tower : mco.tower
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp pilot : multi engine pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 9500 flight time type : 2000
ASRS Report	523684
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : overshoot conflict : nmac non adherence : required legal separation non adherence : clearance
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : returned to assigned altitude flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon leaving holding, we were cleared to descend to 9000 ft direct to camrn intersection. Shortly after leveling off at 9000 ft and approximately between 10-20 mi south of camrn, a TCASII target was observed immediately below our aircraft climbing rapidly. As this climbing target approached closer, a TA was issued by the TCASII system. Shortly thereafter, this TA became an RA and the TCASII system directed a climb. Our aircraft was immediately climbed from 9000 ft to 9700 ft whereupon the RA ceased. ZNY was notified of our RA climb, we were issued a turn, and reclred to descend to 9000 ft. My TCASII observation was that the other aircraft came within -300 ft vertically. Horizontal distance was undetermined but the target appeared to be almost directly below our aircraft with the HSI set to a 20 mi scale. The other aircraft was not idented and was not visually observed as WX at the time was IMC.

Original NASA ASRS Text

Title: NMAC. A B757-200 FLT TAKES EVASIVE ACTION CLB IN RESPONSE TO A TCASII RA FROM AN ACFT THAT OVERSHOT ITS ASSIGNED ALT DURING CLB 50 MI SSW OF JFK, NY.

Narrative: UPON LEAVING HOLDING, WE WERE CLRED TO DSND TO 9000 FT DIRECT TO CAMRN INTXN. SHORTLY AFTER LEVELING OFF AT 9000 FT AND APPROX BTWN 10-20 MI S OF CAMRN, A TCASII TARGET WAS OBSERVED IMMEDIATELY BELOW OUR ACFT CLBING RAPIDLY. AS THIS CLBING TARGET APCHED CLOSER, A TA WAS ISSUED BY THE TCASII SYS. SHORTLY THEREAFTER, THIS TA BECAME AN RA AND THE TCASII SYS DIRECTED A CLB. OUR ACFT WAS IMMEDIATELY CLBED FROM 9000 FT TO 9700 FT WHEREUPON THE RA CEASED. ZNY WAS NOTIFIED OF OUR RA CLB, WE WERE ISSUED A TURN, AND RECLRED TO DSND TO 9000 FT. MY TCASII OBSERVATION WAS THAT THE OTHER ACFT CAME WITHIN -300 FT VERTLY. HORIZ DISTANCE WAS UNDETERMINED BUT THE TARGET APPEARED TO BE ALMOST DIRECTLY BELOW OUR ACFT WITH THE HSI SET TO A 20 MI SCALE. THE OTHER ACFT WAS NOT IDENTED AND WAS NOT VISUALLY OBSERVED AS WX AT THE TIME WAS IMC.

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.