Air carrier X climb through occupied altitude had less than standard separation from air carrier Y. ...

Attributes
ACN	294313
Time
Date	199501
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mlo
State Reference	FL
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mco
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 4 controller radar : 11
ASRS Report	294313
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 900
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

I was working aircraft X on departure level at 8000 ft. Arrival was working aircraft Y level at 9000 ft. Aircraft Y appeared to be projected to go behind aircraft X so I issued climb instructions to aircraft X. I immediately noticed aircraft Y in a turn, which would not have insured divergence, and instructed aircraft X to maintain 8000 ft. He (aircraft X) stated that he got an RA and was going to 8000 ft. The controller of aircraft Y was perfectly legal to turn the aircraft, I just 'jumped the gun' and tried to climb too soon.

Original NASA ASRS Text

Title: ACR X CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: I WAS WORKING ACFT X ON DEP LEVEL AT 8000 FT. ARR WAS WORKING ACFT Y LEVEL AT 9000 FT. ACFT Y APPEARED TO BE PROJECTED TO GO BEHIND ACFT X SO I ISSUED CLB INSTRUCTIONS TO ACFT X. I IMMEDIATELY NOTICED ACFT Y IN A TURN, WHICH WOULD NOT HAVE INSURED DIVERGENCE, AND INSTRUCTED ACFT X TO MAINTAIN 8000 FT. HE (ACFT X) STATED THAT HE GOT AN RA AND WAS GOING TO 8000 FT. THE CTLR OF ACFT Y WAS PERFECTLY LEGAL TO TURN THE ACFT, I JUST 'JUMPED THE GUN' AND TRIED TO CLB TOO SOON.

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.

Air carrier X climb through occupied altitude had less than standard separation from air carrier Y. System error.