<< >> NASA ASRS Report 426185, January 1999

Aircraft Y did not follow instructions given by the reporter. This resulted in aircraft X being pulled off the final approach. Reporter had to resort to visual separation between both aircraft.

Attributes
ACN	426185
Time
Date	199901
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : msp
State Reference	MN
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	SF 340A
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Citation I
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Experience	controller radar : 8
ASRS Report	426185
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : ground less severe non adherence : required legal separation non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

The C550 (aircraft Y) came over to me at 3000 ft from satellite. I had cleared the SF34 (aircraft X) for the ILS runway 12L approach and he was about 2 mi outside the marker. I gave the C550 a 190 KT speed restr and he read back 190 degree heading. I observed him turning, questioned his heading and turned him (C550) immediately out of the way and then immediately broke the SF34 off the approach to the southwest and climbed him. I pointed out traffic to the C550 and he reported the SF34 in sight and then maintained visual separation from him as he turned.

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Original NASA ASRS Text

Title: ACFT Y DID NOT FOLLOW INSTRUCTIONS GIVEN BY THE RPTR. THIS RESULTED IN ACFT X BEING PULLED OFF THE FINAL APCH. RPTR HAD TO RESORT TO VISUAL SEPARATION BTWN BOTH ACFT.

Narrative: THE C550 (ACFT Y) CAME OVER TO ME AT 3000 FT FROM SATELLITE. I HAD CLRED THE SF34 (ACFT X) FOR THE ILS RWY 12L APCH AND HE WAS ABOUT 2 MI OUTSIDE THE MARKER. I GAVE THE C550 A 190 KT SPD RESTR AND HE READ BACK 190 DEG HDG. I OBSERVED HIM TURNING, QUESTIONED HIS HDG AND TURNED HIM (C550) IMMEDIATELY OUT OF THE WAY AND THEN IMMEDIATELY BROKE THE SF34 OFF THE APCH TO THE SW AND CLBED HIM. I POINTED OUT TFC TO THE C550 AND HE RPTED THE SF34 IN SIGHT AND THEN MAINTAINED VISUAL SEPARATION FROM HIM AS HE TURNED.

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.