Loss of separation when air carrier X makes a wrong direction turn in front of air carrier Y.

Attributes
ACN	296105
Time
Date	199502
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pdk
State Reference	GA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : atl tower : bfi
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	296105
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft X was assigned a heading and specific direction to turn to enter the downwind. Aircraft Y was to right and behind aircraft X on parallel heading, same altitude. Aircraft X turned opposite the assigned heading and was not less than 3 mi from aircraft Y. Aircraft Y was turned immediately away from and climbed above aircraft X. Both aircraft were then vectored to the traffic pattern. Callback conversation with reporter revealed the following information: reporter indicated that the flight crew of aircraft X had a problem speaking and understanding english. Reporter also indicated that the flight crew of aircraft Y had observed aircraft X turn and was prepared for evasive action.

Original NASA ASRS Text

Title: LOSS OF SEPARATION WHEN ACR X MAKES A WRONG DIRECTION TURN IN FRONT OF ACR Y.

Narrative: ACFT X WAS ASSIGNED A HDG AND SPECIFIC DIRECTION TO TURN TO ENTER THE DOWNWIND. ACFT Y WAS TO R AND BEHIND ACFT X ON PARALLEL HDG, SAME ALT. ACFT X TURNED OPPOSITE THE ASSIGNED HDG AND WAS NOT LESS THAN 3 MI FROM ACFT Y. ACFT Y WAS TURNED IMMEDIATELY AWAY FROM AND CLBED ABOVE ACFT X. BOTH ACFT WERE THEN VECTORED TO THE TFC PATTERN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR INDICATED THAT THE FLC OF ACFT X HAD A PROB SPEAKING AND UNDERSTANDING ENGLISH. RPTR ALSO INDICATED THAT THE FLC OF ACFT Y HAD OBSERVED ACFT X TURN AND WAS PREPARED FOR EVASIVE ACTION.

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.