Air carrier X had less than standard radar separation from air carrier Y. System error.

Attributes
ACN	247053
Time
Date	199307
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mke
State Reference	WI
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mke tower : mke tracon : sdf
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 230 flight time total : 11000
ASRS Report	247053
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 flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 12000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Mke tower cleared air carrier X for takeoff on runway 7R climb to 2000 ft MSL turn left to 290 degrees (brew 3 departure), which I read back. Because we were going south to ord, the captain, who was flying, elected to climb at V2 plus 10 KTS (135 KTS) to keep from getting any further out of the way. The problem comes along when another aircraft which departed ahead of us (he rotated as we began our takeoff run) accelerated during his departure so that when we rolled out on our 290 heading he ended up to our right about 2 mi same altitude and heading (other aircraft also had the same departure clearance). The tower was busy with other traffic and didn't send us over to departure. Tower finally sends us over to departure by this time we are out of 4500 MSL to level at 5000 ft flying a 2 mi formation with the medium large transport who is now turning towards us. I advised the captain we better do something about this. Departure control is trying to talk to us as I FLIP the switch to their frequency. The medium large transport was along side us level at 5000 ft turning toward us!! The medium large transport, realizing his flying environment, sees us and turns back to the right departure gives him 7000 ft MSL. I acknowledge we are on the frequency. Level at 5000, 290 degrees on the heading with the medium large transport in sight and we had the medium large transport in sight all the way.

Original NASA ASRS Text

Title: ACR X HAD LESS THAN STANDARD RADAR SEPARATION FROM ACR Y. SYS ERROR.

Narrative: MKE TWR CLRED ACR X FOR TKOF ON RWY 7R CLB TO 2000 FT MSL TURN L TO 290 DEGS (BREW 3 DEP), WHICH I READ BACK. BECAUSE WE WERE GOING S TO ORD, THE CAPT, WHO WAS FLYING, ELECTED TO CLB AT V2 PLUS 10 KTS (135 KTS) TO KEEP FROM GETTING ANY FURTHER OUT OF THE WAY. THE PROB COMES ALONG WHEN ANOTHER ACFT WHICH DEPARTED AHEAD OF US (HE ROTATED AS WE BEGAN OUR TKOF RUN) ACCELERATED DURING HIS DEP SO THAT WHEN WE ROLLED OUT ON OUR 290 HDG HE ENDED UP TO OUR R ABOUT 2 MI SAME ALT AND HDG (OTHER ACFT ALSO HAD THE SAME DEP CLRNC). THE TWR WAS BUSY WITH OTHER TFC AND DIDN'T SEND US OVER TO DEP. TWR FINALLY SENDS US OVER TO DEP BY THIS TIME WE ARE OUT OF 4500 MSL TO LEVEL AT 5000 FT FLYING A 2 MI FORMATION WITH THE MLG WHO IS NOW TURNING TOWARDS US. I ADVISED THE CAPT WE BETTER DO SOMETHING ABOUT THIS. DEP CTL IS TRYING TO TALK TO US AS I FLIP THE SWITCH TO THEIR FREQ. THE MLG WAS ALONG SIDE US LEVEL AT 5000 FT TURNING TOWARD US!! THE MLG, REALIZING HIS FLYING ENVIRONMENT, SEES US AND TURNS BACK TO THE R DEP GIVES HIM 7000 FT MSL. I ACKNOWLEDGE WE ARE ON THE FREQ. LEVEL AT 5000, 290 DEGS ON THE HDG WITH THE MLG IN SIGHT AND WE HAD THE MLG IN SIGHT ALL THE WAY.

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.