Near midair collision result of intruder L1011 overshoot to altitude of reporter E120.

Attributes
ACN	436214
Time
Date	199905
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl.airport
Altitude	msl single value : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl.tracon
Operator	common carrier : air carrier
Make Model Name	Xingu EMB-121 All Series
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : atl.tracon
Operator	common carrier : air carrier
Make Model Name	L-1011 Tri-Star All Series
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine pilot : cfi
Experience	flight time last 90 days : 300 flight time total : 1500 flight time type : 1000
ASRS Report	436214
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : airborne critical conflict : nmac non adherence : clearance non adherence : far
Independent Detector	atc equipment : conflict alert
Resolutory Action	controller : issued alert flight crew : exited adverse environment flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach under vectors into atl airport, an air carrier L1011 climbed toward our assigned altitude. ATC advised us to climb for evasive action. The aircraft passed below us by 600 ft. We returned to our assigned altitude and continued the flight uneventfully. ATC advised the L1011 flew through his assigned altitude. There was no further communication on the subject.

Original NASA ASRS Text

Title: NMAC RESULT OF INTRUDER L1011 OVERSHOOT TO ALT OF RPTR E120.

Narrative: ON APCH UNDER VECTORS INTO ATL ARPT, AN ACR L1011 CLBED TOWARD OUR ASSIGNED ALT. ATC ADVISED US TO CLB FOR EVASIVE ACTION. THE ACFT PASSED BELOW US BY 600 FT. WE RETURNED TO OUR ASSIGNED ALT AND CONTINUED THE FLT UNEVENTFULLY. ATC ADVISED THE L1011 FLEW THROUGH HIS ASSIGNED ALT. THERE WAS NO FURTHER COM ON THE SUBJECT.

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.