Fgt X non adherence to ATC instruction had near midair collision with fgt Y. See and avoid concept. ...

Attributes
ACN	201927
Time
Date	199202
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : nkt
State Reference	NC
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : nkt
Operator	other
Make Model Name	Fighter
Flight Phase	other
Aircraft 2
Operator	other
Make Model Name	Fighter
Flight Phase	descent : approach
Person 1
Affiliation	government other
Function	controller : local
Qualification	controller : radar
Experience	controller military : 3 controller radar : 10
ASRS Report	201927
Person 2
Affiliation	government : military
Function	flight crew : single pilot
Qualification	pilot : military
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 300 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Fgt X proceeded inbound for the overhead approach runway 5R I instructed it to break right non-standard at the northeast field boundaries to pass behind an fgt Y 3 mi TACAN approach runway 32L. The fgt X broke left and entered a left downwind in front of the fgt Y. I issued traffic to both. They both reported each other is sight. Both aircraft continued on their respective flight paths and did not alter until the fgt Y came within about 300 ft of the fgt X and then the fgt Y dipped below the fgt X and missed by about 50 ft. In the purest sense, by issuing traffic and each other having each other in sight. I believe my legal requirements in accordance with FAA order 7110.65F would have been met, however though neither aircraft complained then or later for me it was too close. If the fgt X at the same time as the fgt Y decided to avert by going under, there would have been a race for the deck and eventually a building hit or a mid-air. If I had a chance to do it again I would have done one or more of the following. Reiterate to the fgt X the non- standard right break and traffic to pass behind. Waved off the TACAN fgt Y as soon as the fgt X broke wrong. Ask the fgt X to report the fgt Y in sight prior to the aircraft reaching the break point.

Original NASA ASRS Text

Title: FGT X NON ADHERENCE TO ATC INSTRUCTION HAD NMAC WITH FGT Y. SEE AND AVOID CONCEPT. EVASIVE ACTION TAKEN.

Narrative: FGT X PROCEEDED INBOUND FOR THE OVERHEAD APCH RWY 5R I INSTRUCTED IT TO BREAK R NON-STANDARD AT THE NE FIELD BOUNDARIES TO PASS BEHIND AN FGT Y 3 MI TACAN APCH RWY 32L. THE FGT X BROKE L AND ENTERED A L DOWNWIND IN FRONT OF THE FGT Y. I ISSUED TFC TO BOTH. THEY BOTH RPTED EACH OTHER IS SIGHT. BOTH ACFT CONTINUED ON THEIR RESPECTIVE FLT PATHS AND DID NOT ALTER UNTIL THE FGT Y CAME WITHIN ABOUT 300 FT OF THE FGT X AND THEN THE FGT Y DIPPED BELOW THE FGT X AND MISSED BY ABOUT 50 FT. IN THE PUREST SENSE, BY ISSUING TFC AND EACH OTHER HAVING EACH OTHER IN SIGHT. I BELIEVE MY LEGAL REQUIREMENTS IN ACCORDANCE WITH FAA ORDER 7110.65F WOULD HAVE BEEN MET, HOWEVER THOUGH NEITHER ACFT COMPLAINED THEN OR LATER FOR ME IT WAS TOO CLOSE. IF THE FGT X AT THE SAME TIME AS THE FGT Y DECIDED TO AVERT BY GOING UNDER, THERE WOULD HAVE BEEN A RACE FOR THE DECK AND EVENTUALLY A BUILDING HIT OR A MID-AIR. IF I HAD A CHANCE TO DO IT AGAIN I WOULD HAVE DONE ONE OR MORE OF THE FOLLOWING. REITERATE TO THE FGT X THE NON- STANDARD R BREAK AND TFC TO PASS BEHIND. WAVED OFF THE TACAN FGT Y AS SOON AS THE FGT X BROKE WRONG. ASK THE FGT X TO RPT THE FGT Y IN SIGHT PRIOR TO THE ACFT REACHING THE BREAK POINT.

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.

Fgt X non adherence to ATC instruction had near midair collision with fgt Y. See and avoid concept. Evasive action taken.