<< >> NASA ASRS Report 115693, June 1989

Aircraft climbed through altitude occupied by another aircraft resulting in less than standard separation.

Attributes
ACN	115693
Time
Date	198906
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tvt
State Reference	OH
Altitude	msl bound lower : 24000 msl bound upper : 24300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 4 controller radar : 3
ASRS Report	115693
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 25800 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Radar training was in process. Trainee had 8 immediate situations pending. We cleared all except one. Aircraft X was slow moving at FL240 northbound and aircraft Y was climbing wbound to FL280. Aircraft Y was thought to be able to out climb and go behind aircraft X. It didn't.

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Original NASA ASRS Text

Title: ACFT CLIMBED THROUGH ALT OCCUPIED BY ANOTHER ACFT RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: RADAR TRAINING WAS IN PROCESS. TRAINEE HAD 8 IMMEDIATE SITUATIONS PENDING. WE CLRED ALL EXCEPT ONE. ACFT X WAS SLOW MOVING AT FL240 NBOUND AND ACFT Y WAS CLIMBING WBOUND TO FL280. ACFT Y WAS THOUGHT TO BE ABLE TO OUT CLIMB AND GO BEHIND ACFT X. IT DIDN'T.

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.