Less than standard separation occurred between a departing aircraft and an arrival aircraft.

Attributes
ACN	146203
Time
Date	199005
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : iah
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah tower : ind
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
ASRS Report	146203
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	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 1800 vertical : 400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

An aircraft departing iah sebnd going out our bolos departure gate was climbing to 15000', level at 10000' to pick up his speed, and came within .3 mi and 400' from an arrival at 10000', in from over gilgo arrival gate. My attention was to traffic about 30-40 mi north of the occurrence. Our C/a system alerted me when the aircraft were 3 1/2 mi apart and 1 at 10200' and 10000'. I then turn my aircraft left to 090 degrees, then 060 degrees. But the other aircraft was in a right turn, so my aircraft said, 'I have him, he's turning right, I'm going straight.' factor: my aircraft had to be leveled at 9000' about 15 mi from occurrence for traffic. Also crew of my aircraft leveled at 10000' to pick up speed. Also the other aircraft had his speed deleted and the other controller saw the situation and didn't alert me. But all and all, I failed to scan correctly because of the vol of traffic north of this occurrence, I failed to see the situation develop. To prevent this occurrence, tell pilot to maintain 250 KTS tell out of 11000' since our arrs come in at 10000'.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION OCCURRED BETWEEN A DEPARTING ACFT AND AN ARR ACFT.

Narrative: AN ACFT DEPARTING IAH SEBND GOING OUT OUR BOLOS DEP GATE WAS CLBING TO 15000', LEVEL AT 10000' TO PICK UP HIS SPD, AND CAME WITHIN .3 MI AND 400' FROM AN ARR AT 10000', IN FROM OVER GILGO ARR GATE. MY ATTN WAS TO TFC ABOUT 30-40 MI N OF THE OCCURRENCE. OUR C/A SYS ALERTED ME WHEN THE ACFT WERE 3 1/2 MI APART AND 1 AT 10200' AND 10000'. I THEN TURN MY ACFT LEFT TO 090 DEGS, THEN 060 DEGS. BUT THE OTHER ACFT WAS IN A RIGHT TURN, SO MY ACFT SAID, 'I HAVE HIM, HE'S TURNING RIGHT, I'M GOING STRAIGHT.' FACTOR: MY ACFT HAD TO BE LEVELED AT 9000' ABOUT 15 MI FROM OCCURRENCE FOR TFC. ALSO CREW OF MY ACFT LEVELED AT 10000' TO PICK UP SPD. ALSO THE OTHER ACFT HAD HIS SPD DELETED AND THE OTHER CTLR SAW THE SITUATION AND DIDN'T ALERT ME. BUT ALL AND ALL, I FAILED TO SCAN CORRECTLY BECAUSE OF THE VOL OF TFC N OF THIS OCCURRENCE, I FAILED TO SEE THE SITUATION DEVELOP. TO PREVENT THIS OCCURRENCE, TELL PLT TO MAINTAIN 250 KTS TELL OUT OF 11000' SINCE OUR ARRS COME IN AT 10000'.

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.