<< >> NASA ASRS Report 232457, January 1993

Cga jet responding to TCASII from a VFR aircraft, climbs into an IFR aircraft above, resulting in less than standard separation.

Attributes
ACN	232457
Time
Date	199301
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hpn
State Reference	NY
Altitude	msl bound lower : 3000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	general aviation : corporate
Make Model Name	Medium Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent : approach
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 15
ASRS Report	232457
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	faa : assigned or threatened penalties
Miss Distance	horizontal : 9000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cga X, an mdt, on IFR flight plan inbound to westchester county airport, was level at 3000 ft. VFR traffic, known to be at 2500 ft was issued to cga X. Cga X received a TCASII RA to climb, and did advise ATC. This RA resulted in cga X climbing into an IFR aircraft on vectors to lga airport and level at 4000 ft. Callback conversation with reporter revealed the following information: called reporter to get address and discuss incident. Reporter claims that he reported the incident to his supervisor and that a pilot deviation was filed because there was a loss of separation. Reporter understands that pilots are supposed to take action whenever the TCASII goes off, but thinks that something has to be changed with the equipment to prevent pilot action that actually creates a greater hazard. In this case, the traffic was issued and the pilot had the traffic in sight.

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Original NASA ASRS Text

Title: CGA JET RESPONDING TO TCASII FROM A VFR ACFT, CLBS INTO AN IFR ACFT ABOVE, RESULTING IN LTSS.

Narrative: CGA X, AN MDT, ON IFR FLT PLAN INBOUND TO WESTCHESTER COUNTY ARPT, WAS LEVEL AT 3000 FT. VFR TFC, KNOWN TO BE AT 2500 FT WAS ISSUED TO CGA X. CGA X RECEIVED A TCASII RA TO CLB, AND DID ADVISE ATC. THIS RA RESULTED IN CGA X CLBING INTO AN IFR ACFT ON VECTORS TO LGA ARPT AND LEVEL AT 4000 FT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CALLED RPTR TO GET ADDRESS AND DISCUSS INCIDENT. RPTR CLAIMS THAT HE RPTED THE INCIDENT TO HIS SUPVR AND THAT A PLTDEV WAS FILED BECAUSE THERE WAS A LOSS OF SEPARATION. RPTR UNDERSTANDS THAT PLTS ARE SUPPOSED TO TAKE ACTION WHENEVER THE TCASII GOES OFF, BUT THINKS THAT SOMETHING HAS TO BE CHANGED WITH THE EQUIP TO PREVENT PLT ACTION THAT ACTUALLY CREATES A GREATER HAZARD. IN THIS CASE, THE TFC WAS ISSUED AND THE PLT HAD THE TFC IN SIGHT.

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.