<< >> NASA ASRS Report 207828, April 1992

Air carrier X non adherence to ATC instructions turned wrong way had near midair collision with Y. See and avoid. Evasive action taken.

Attributes
ACN	207828
Time
Date	199204
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : isp
State Reference	NY
Altitude	msl bound lower : 3500 msl bound upper : 3500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent : approach descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Route In Use	approach : visual
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 85 flight time total : 3500 flight time type : 2000
ASRS Report	207828
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 400 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATC called traffic. Air carrier X immediately acquired traffic at 10 O'clock 500-700 ft horizontal same altitude on a converging course. Intruder was in a 10-15 degree right bank. A collision appeared imminent. I banked 60 degrees to the right through 90 degree azimuth and performed 2-3 G pull up through 300 ft altitude. Intruder apparently also performed a right turn, climbing maneuver. First officer acquired intruder at 5 O'clock same altitude and again turning toward us. So we descended with traffic at 6 O'clock and did not see him again. Intruder Y was apparently being worked by another controller. ATC had advised us to turn left (toward traffic) and descend. Possibly the intruder Y was also given conflicting RA. The controller did not issue a TA or otherwise convey a sense of urgency. TCASII would have helped us to avoid this conflict.

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Original NASA ASRS Text

Title: ACR X NON ADHERENCE TO ATC INSTRUCTIONS TURNED WRONG WAY HAD NMAC WITH Y. SEE AND AVOID. EVASIVE ACTION TAKEN.

Narrative: ATC CALLED TFC. ACR X IMMEDIATELY ACQUIRED TFC AT 10 O'CLOCK 500-700 FT HORIZ SAME ALT ON A CONVERGING COURSE. INTRUDER WAS IN A 10-15 DEG R BANK. A COLLISION APPEARED IMMINENT. I BANKED 60 DEGS TO THE R THROUGH 90 DEG AZIMUTH AND PERFORMED 2-3 G PULL UP THROUGH 300 FT ALT. INTRUDER APPARENTLY ALSO PERFORMED A R TURN, CLBING MANEUVER. FO ACQUIRED INTRUDER AT 5 O'CLOCK SAME ALT AND AGAIN TURNING TOWARD US. SO WE DSNDED WITH TFC AT 6 O'CLOCK AND DID NOT SEE HIM AGAIN. INTRUDER Y WAS APPARENTLY BEING WORKED BY ANOTHER CTLR. ATC HAD ADVISED US TO TURN L (TOWARD TFC) AND DSND. POSSIBLY THE INTRUDER Y WAS ALSO GIVEN CONFLICTING RA. THE CTLR DID NOT ISSUE A TA OR OTHERWISE CONVEY A SENSE OF URGENCY. TCASII WOULD HAVE HELPED US TO AVOID THIS CONFLICT.

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.