B767 experienced near midair collision with MD80 at 4000 ft in atl.

Attributes
ACN	594974
Time
Date	200309
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : catta
State Reference	GA
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a80.tracon
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 8l other
Flight Phase	descent : approach
Route In Use	approach : visual approach : instrument non precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : a80.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
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	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6500 flight time type : 100
ASRS Report	594974
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On final for a visual approach to runway 8L at atl. Level at 4000 ft MSL and about to intercept the ILS GS on the localizer. Got 'traffic, traffic' from TCASII and spotted an md-80 in a right turn, approaching from our right side. Md-80 appeared to be turning to intercept final to runway 9R (parallel), but over-shooting. All 3 of us in cockpit (including relief pilot) saw the md-80. Md-80 stayed in shallow right turn, but continued to approach our aircraft. I disconnected the autoplt to prevent our aircraft from starting down the GS. (Md-80 was slightly lower). Somewhere in here, approach control advised about overshooting aircraft, but did not issue any instructions. As md-80 closed, I began a climb (shallow) to ensure some vertical separation. TCASII RA said 'monitor vertical speed,' but I don't know what vertical speed was advised, because I was watching the md-80, not the vsi. The md-80 continued to close and flew under our aircraft. It disappeared there for 5-10 seconds, then re-appeared on our right in a right turn back toward the runway 9R final. Consider this a TCASII save. I will be interested to see what the radar tapes show for vertical separation. Lateral separation was zero. Long story short -- md-80 overshot final, eventually lining up on the parallel runway. Aircraft on parallel final is cued by TCASII, gets a visual, and avoids collision. Crew coordination in our aircraft was excellent. Relief pilot unstrapped and moved to the window behind me in order to maintain visual on traffic. Captain helped monitor speed. Confign, and altitude.

Original NASA ASRS Text

Title: B767 EXPERIENCED NMAC WITH MD80 AT 4000 FT IN ATL.

Narrative: ON FINAL FOR A VISUAL APCH TO RWY 8L AT ATL. LEVEL AT 4000 FT MSL AND ABOUT TO INTERCEPT THE ILS GS ON THE LOC. GOT 'TFC, TFC' FROM TCASII AND SPOTTED AN MD-80 IN A R TURN, APCHING FROM OUR R SIDE. MD-80 APPEARED TO BE TURNING TO INTERCEPT FINAL TO RWY 9R (PARALLEL), BUT OVER-SHOOTING. ALL 3 OF US IN COCKPIT (INCLUDING RELIEF PLT) SAW THE MD-80. MD-80 STAYED IN SHALLOW R TURN, BUT CONTINUED TO APCH OUR ACFT. I DISCONNECTED THE AUTOPLT TO PREVENT OUR ACFT FROM STARTING DOWN THE GS. (MD-80 WAS SLIGHTLY LOWER). SOMEWHERE IN HERE, APCH CTL ADVISED ABOUT OVERSHOOTING ACFT, BUT DID NOT ISSUE ANY INSTRUCTIONS. AS MD-80 CLOSED, I BEGAN A CLB (SHALLOW) TO ENSURE SOME VERT SEPARATION. TCASII RA SAID 'MONITOR VERT SPD,' BUT I DON'T KNOW WHAT VERT SPD WAS ADVISED, BECAUSE I WAS WATCHING THE MD-80, NOT THE VSI. THE MD-80 CONTINUED TO CLOSE AND FLEW UNDER OUR ACFT. IT DISAPPEARED THERE FOR 5-10 SECONDS, THEN RE-APPEARED ON OUR R IN A R TURN BACK TOWARD THE RWY 9R FINAL. CONSIDER THIS A TCASII SAVE. I WILL BE INTERESTED TO SEE WHAT THE RADAR TAPES SHOW FOR VERT SEPARATION. LATERAL SEPARATION WAS ZERO. LONG STORY SHORT -- MD-80 OVERSHOT FINAL, EVENTUALLY LINING UP ON THE PARALLEL RWY. ACFT ON PARALLEL FINAL IS CUED BY TCASII, GETS A VISUAL, AND AVOIDS COLLISION. CREW COORD IN OUR ACFT WAS EXCELLENT. RELIEF PLT UNSTRAPPED AND MOVED TO THE WINDOW BEHIND ME IN ORDER TO MAINTAIN VISUAL ON TFC. CAPT HELPED MONITOR SPD. CONFIGN, AND ALT.

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.