Air carrier X overtook air carrier Y at the same altitude while on approach.

Attributes
ACN	108034
Time
Date	198904
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : msp
State Reference	MN
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 2 controller radar : 4
ASRS Report	108034
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time other
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

One aircraft overtook another aircraft on downwind at same altitude. This was not noticed until the C/a sounded, at which time corrective actions were taken. The assignment of both aircraft to the same altitude was an oversight on my part and not detected by me due to my attention to other duties.

Original NASA ASRS Text

Title: ACR X OVERTOOK ACR Y AT THE SAME ALT WHILE ON APCH.

Narrative: ONE ACFT OVERTOOK ANOTHER ACFT ON DOWNWIND AT SAME ALT. THIS WAS NOT NOTICED UNTIL THE C/A SOUNDED, AT WHICH TIME CORRECTIVE ACTIONS WERE TAKEN. THE ASSIGNMENT OF BOTH ACFT TO THE SAME ALT WAS AN OVERSIGHT ON MY PART AND NOT DETECTED BY ME DUE TO MY ATTN TO OTHER DUTIES.

Data retrieved from NASA's ASRS site as of August 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.