TRACON interfacility coordination air carrier X unauthorized uncoord penetration of approach control airspace had near midair collision less than standard separation with small transport Y. System error.

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Attributes
ACN	245118
Time
Date	199307
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : orl
State Reference	FL
Altitude	msl bound lower : 5000 msl bound upper : 5500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mco tower : cos
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : developmental controller : radar
Experience	controller military : 2 controller radar : 10
ASRS Report	245118
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	conflict : nmac non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

I was working west departure and had radar idented air carrier X and climbed to 5000 ft and turned wbound. Traffic load was moderate but very complex due to nonstandard rtes/altitudes being flown by other aircraft under my control. My attention was diverted to another aircraft when I received a collision alert from the ARTS IIIA computer and observed air carrier X transitioning under an IFR small transport Y which another sector was working and which was descending through 5500 ft. The aircraft were 90 degrees to each other so a collision was unlikely but there was a definite loss to separation. I simply caused the operational error due to traffic density/complexity.

Original NASA ASRS Text

Title: TRACON INTERFAC COORD ACR X UNAUTH UNCOORD PENETRATION OF APCH CTL AIRSPACE HAD NMAC LTSS WITH SMT Y. SYS ERROR.

Narrative: I WAS WORKING W DEP AND HAD RADAR IDENTED ACR X AND CLBED TO 5000 FT AND TURNED WBOUND. TFC LOAD WAS MODERATE BUT VERY COMPLEX DUE TO NONSTANDARD RTES/ALTS BEING FLOWN BY OTHER ACFT UNDER MY CTL. MY ATTN WAS DIVERTED TO ANOTHER ACFT WHEN I RECEIVED A COLLISION ALERT FROM THE ARTS IIIA COMPUTER AND OBSERVED ACR X TRANSITIONING UNDER AN IFR SMT Y WHICH ANOTHER SECTOR WAS WORKING AND WHICH WAS DSNDING THROUGH 5500 FT. THE ACFT WERE 90 DEGS TO EACH OTHER SO A COLLISION WAS UNLIKELY BUT THERE WAS A DEFINITE LOSS TO SEPARATION. I SIMPLY CAUSED THE OPERROR DUE TO TFC DENSITY/COMPLEXITY.

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.