Air carrier X TCASII RA with VFR Y evasive action climb. Non adherence to ATC clearance.

Attributes
ACN	277519
Time
Date	199407
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cvg
State Reference	OH
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cvg
Operator	common carrier : air carrier
Make Model Name	SF 340A
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller radar : 15
ASRS Report	277519
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X, SF34, was being vectored to runway 18L final approach fix. Traffic called on Y, LR35, VFR, who had canceled radar services. X did not have traffic in sight. Y was off X's left side and passed behind him on the vector. After target's track diverged and passed behind X, he climbed 500 ft. Both aircraft at 5000 ft. Y was never a factor, and the TCASII did not respond until tracks diverged. Recommend pilots turn off TCASII in terminal environment.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH VFR Y EVASIVE ACTION CLB. NON ADHERENCE TO ATC CLRNC.

Narrative: ACR X, SF34, WAS BEING VECTORED TO RWY 18L FINAL APCH FIX. TFC CALLED ON Y, LR35, VFR, WHO HAD CANCELED RADAR SVCS. X DID NOT HAVE TFC IN SIGHT. Y WAS OFF X'S L SIDE AND PASSED BEHIND HIM ON THE VECTOR. AFTER TARGET'S TRACK DIVERGED AND PASSED BEHIND X, HE CLBED 500 FT. BOTH ACFT AT 5000 FT. Y WAS NEVER A FACTOR, AND THE TCASII DID NOT RESPOND UNTIL TRACKS DIVERGED. RECOMMEND PLTS TURN OFF TCASII IN TERMINAL ENVIRONMENT.

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.