<< >> NASA ASRS Report 404094, June 1998

Air carrier X departs dtw runway on runway 21L with clearance instructions to turn left after takeoff. Apparently before starting left turn, the crew observed air carrier Y, presumably on their right, flying toward and over their position.

Attributes
ACN	404094
Time
Date	199806
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dtw tower : ewr
Operator	general aviation : corporate
Make Model Name	Gulfstream IV
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	climbout : takeoff climbout : intermediate altitude climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 15000 flight time type : 1000
ASRS Report	404094
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were issued a takeoff clearance on runway 21L at dtw. The clearance was turn left to 140 degrees and climb and maintain 4000 ft. At about 1500 ft MSL, we saw an air carrier that took off on either runway 21C or runway 21R, turning toward us. We then stopped our climb and the air carrier continued over us at less than 1000 ft separation. We do not know if the error was on the part of the tower or the air carrier. No further incident resulted.

Related reports:

• An air carrier F100 deviated around thunderstorms apparently...

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Original NASA ASRS Text

Title: ACR X DEPARTS DTW RWY ON RWY 21L WITH CLRNC INSTRUCTIONS TO TURN L AFTER TKOF. APPARENTLY BEFORE STARTING L TURN, THE CREW OBSERVED ACR Y, PRESUMABLY ON THEIR R, FLYING TOWARD AND OVER THEIR POS.

Narrative: WE WERE ISSUED A TKOF CLRNC ON RWY 21L AT DTW. THE CLRNC WAS TURN L TO 140 DEGS AND CLB AND MAINTAIN 4000 FT. AT ABOUT 1500 FT MSL, WE SAW AN ACR THAT TOOK OFF ON EITHER RWY 21C OR RWY 21R, TURNING TOWARD US. WE THEN STOPPED OUR CLB AND THE ACR CONTINUED OVER US AT LESS THAN 1000 FT SEPARATION. WE DO NOT KNOW IF THE ERROR WAS ON THE PART OF THE TWR OR THE ACR. NO FURTHER INCIDENT RESULTED.

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.