Less than standard separation between 2 air carrier. Operational error.

Attributes
ACN	100480
Time
Date	198812
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia
State Reference	FL
Altitude	msl bound lower : 5600 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude descent other
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000
ASRS Report	100480
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4000
ASRS Report	100488
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	other other : unspecified atc
Resolutory Action	controller : issued new clearance none taken : insufficient time none taken : unable
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X departed mia on runway 09L on a mia 5 departure. Mia tower turned X over to mia departure control on 119.45 shortly after takeoff. Departure control reclred X to 7000' on runway heading. X was then given a left turn to 290 degree heading. After passing 045 degree heading X was instructed to return to a 060 degree heading. X stopped its left turn and turned right to a 060 degree heading. The next instructions were given to company Y to turn to a heading of 340 degrees. While maintaining a heading of 060 degrees and climbing through 5600', air carrier X was instructed to level at 5000' and traffic was called at 12 O'clock, 2 mi, and 6000'. X descended to 5000' on heading of 060 degrees. X was then given a left turn to 340 degrees. Possible contributing factor was frequency congestion which did not allow X to question the instructions given to company trip Y.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN 2 ACR. OPERATIONAL ERROR.

Narrative: ACR X DEPARTED MIA ON RWY 09L ON A MIA 5 DEP. MIA TWR TURNED X OVER TO MIA DEP CTL ON 119.45 SHORTLY AFTER TKOF. DEP CTL RECLRED X TO 7000' ON RWY HDG. X WAS THEN GIVEN A LEFT TURN TO 290 DEG HDG. AFTER PASSING 045 DEG HDG X WAS INSTRUCTED TO RETURN TO A 060 DEG HDG. X STOPPED ITS LEFT TURN AND TURNED RIGHT TO A 060 DEG HDG. THE NEXT INSTRUCTIONS WERE GIVEN TO COMPANY Y TO TURN TO A HDG OF 340 DEGS. WHILE MAINTAINING A HDG OF 060 DEGS AND CLBING THROUGH 5600', ACR X WAS INSTRUCTED TO LEVEL AT 5000' AND TFC WAS CALLED AT 12 O'CLOCK, 2 MI, AND 6000'. X DSNDED TO 5000' ON HDG OF 060 DEGS. X WAS THEN GIVEN A LEFT TURN TO 340 DEGS. POSSIBLE CONTRIBUTING FACTOR WAS FREQ CONGESTION WHICH DID NOT ALLOW X TO QUESTION THE INSTRUCTIONS GIVEN TO COMPANY TRIP Y.

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.