Air carrier heading track deviation on visual approach creates potential conflict with other traffic...

Attributes
ACN	270354
Time
Date	199404
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 2200 msl bound upper : 3400
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time total : 14000 flight time type : 240
ASRS Report	270354
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : far non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 2400 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared for 9R (ILS) visual approach. When on final approach, another air carrier was cleared for 8L visual. He over shot the 8L, 8R, 9L final approach courses and got on the 9R approach above and behind us. When we saw him we advised ATC, TCASII conflict triggered an evasive maneuvered which we followed, increasing pitch to avoid a midair, we had to follow TCASII on 2 different instances to stay clear of the other aircraft. The wind was not very strong. The aircraft was cleared from the north with a wind estimate 17/08. I believe that loss of situational awareness coupled with inaction may be a contributing factor.

Original NASA ASRS Text

Title: ACR HDG TRACK DEV ON VISUAL APCH CREATES POTENTIAL CONFLICT WITH OTHER TFC.

Narrative: WE WERE CLRED FOR 9R (ILS) VISUAL APCH. WHEN ON FINAL APCH, ANOTHER AIR CARRIER WAS CLEARED FOR 8L VISUAL. HE OVER SHOT THE 8L, 8R, 9L FINAL APCH COURSES AND GOT ON THE 9R APCH ABOVE AND BEHIND US. WHEN WE SAW HIM WE ADVISED ATC, TCASII CONFLICT TRIGGERED AN EVASIVE MANEUVERED WHICH WE FOLLOWED, INCREASING PITCH TO AVOID A MIDAIR, WE HAD TO FOLLOW TCASII ON 2 DIFFERENT INSTANCES TO STAY CLEAR OF THE OTHER ACFT. THE WIND WAS NOT VERY STRONG. THE ACFT WAS CLRED FROM THE N WITH A WIND ESTIMATE 17/08. I BELIEVE THAT LOSS OF SITUATIONAL AWARENESS COUPLED WITH INACTION MAY BE A CONTRIBUTING FACTOR.

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.