An A319 crew respond to a TCASII RA caused by DH6 aircraft with parachute jumpers. A ZNY ARTCC radar controller had issued traffic to both aircraft, but did not advise the A319 crew the DH6 pilot had them in sight.

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Attributes
ACN	627616
Time
Date	200408
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : ign.vor
State Reference	IN
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc tower : ptk.tower
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc
Make Model Name	Twin Otter DHC-6
Operating Under FAR Part	other : 15
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 14
ASRS Report	627616
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical inflight encounter : skydivers
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 21000 vertical : 800
Supplementary
Problem Areas	ATC Human Performance Airport Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure

Narrative:

Aircraft X, A319 was descending from 12000 ft to 10000 ft with a destination of ewr (newark). Aircraft Y DH6 was climbing VFR to 14500 ft to release parachute jumpers over 5ny5 (sky ranch, ny). Aircraft X was climbing southeast of the field because another jump aircraft was releasing jumpers over the field. The aircraft climbs in a spiral pattern and this area was in confliction with the ign 265 degree radial. I called the traffic to aircraft Y and they reported the airbus in sight. I called the traffic to aircraft X but did not state that the traffic 'has you in sight.' aircraft X responded that they were looking. Aircraft X later reported they were responding to a TCASII RA. I then did state to aft X that the traffic 'has you in sight.' aircraft X responded that if they had not responded to the TCASII RA, they would have had a near miss. They also stated that they would file this report.

Original NASA ASRS Text

Title: AN A319 CREW RESPOND TO A TCASII RA CAUSED BY DH6 ACFT WITH PARACHUTE JUMPERS. A ZNY ARTCC RADAR CTLR HAD ISSUED TFC TO BOTH ACFT, BUT DID NOT ADVISE THE A319 CREW THE DH6 PLT HAD THEM IN SIGHT.

Narrative: ACFT X, A319 WAS DSNDING FROM 12000 FT TO 10000 FT WITH A DEST OF EWR (NEWARK). ACFT Y DH6 WAS CLBING VFR TO 14500 FT TO RELEASE PARACHUTE JUMPERS OVER 5NY5 (SKY RANCH, NY). ACFT X WAS CLBING SE OF THE FIELD BECAUSE ANOTHER JUMP ACFT WAS RELEASING JUMPERS OVER THE FIELD. THE ACFT CLBS IN A SPIRAL PATTERN AND THIS AREA WAS IN CONFLICTION WITH THE IGN 265 DEG RADIAL. I CALLED THE TFC TO ACFT Y AND THEY RPTED THE AIRBUS IN SIGHT. I CALLED THE TFC TO ACFT X BUT DID NOT STATE THAT THE TFC 'HAS YOU IN SIGHT.' ACFT X RESPONDED THAT THEY WERE LOOKING. ACFT X LATER RPTED THEY WERE RESPONDING TO A TCASII RA. I THEN DID STATE TO AFT X THAT THE TFC 'HAS YOU IN SIGHT.' ACFT X RESPONDED THAT IF THEY HAD NOT RESPONDED TO THE TCASII RA, THEY WOULD HAVE HAD A NEAR MISS. THEY ALSO STATED THAT THEY WOULD FILE THIS RPT.

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.