Air carrier X TCASII RA with VFR aircraft Y. Evasive action taken. See and avoid concept.

Attributes
ACN	240509
Time
Date	199304
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 12500 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 12
ASRS Report	240509
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X departed ATC wbound on J239. Air carrier X check on frequency from atl approach out of 11500 for 14000. (Atl TCA extends up to 12500 and atl approach extends up to 14000.) air carrier X was issued a climb clearance to FL230. Instructor and trainee were distracted while the instructor critiqued phraseology used by the trainee. Shortly after, air carrier X advised that he was responding to a TCASII RA and turning to miss aircraft Y directly ahead and crossing from left to right. I then realized that air carrier X had VFR traffic skimming the top of the TCA at 12800. Our traffic load was light, but we were not being attentive because of the OJT in progress and because air carrier X was still within atl approach airspace.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH VFR ACFT Y. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: ACR X DEPARTED ATC WBOUND ON J239. ACR X CHK ON FREQ FROM ATL APCH OUT OF 11500 FOR 14000. (ATL TCA EXTENDS UP TO 12500 AND ATL APCH EXTENDS UP TO 14000.) ACR X WAS ISSUED A CLB CLRNC TO FL230. INSTRUCTOR AND TRAINEE WERE DISTRACTED WHILE THE INSTRUCTOR CRITIQUED PHRASEOLOGY USED BY THE TRAINEE. SHORTLY AFTER, ACR X ADVISED THAT HE WAS RESPONDING TO A TCASII RA AND TURNING TO MISS ACFT Y DIRECTLY AHEAD AND XING FROM L TO R. I THEN REALIZED THAT ACR X HAD VFR TFC SKIMMING THE TOP OF THE TCA AT 12800. OUR TFC LOAD WAS LIGHT, BUT WE WERE NOT BEING ATTENTIVE BECAUSE OF THE OJT IN PROGRESS AND BECAUSE ACR X WAS STILL WITHIN ATL APCH AIRSPACE.

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.