Air carrier X TCASII RA with air carrier Y. Non adherence to ATC instruction. Standard separation ex...

Attributes
ACN	247014
Time
Date	199307
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mdw
State Reference	IL
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	other personnel other
Qualification	controller : radar
ASRS Report	247014
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 8
Events
Anomaly	altitude deviation : undershoot non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 3200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The controller climbed air carrier X when it cleared air carrier Y that was converging at 8000 ft. Air carrier X informed the controller of an RA and an alert to descend. Air carrier X descended 200 ft, advised of the RA and then climbed to his assigned altitude of 15000 ft. There was a clearance deviation by the TCASII aircraft of at least 200 ft. Communication regarding the TCASII maneuver took place after the incident. This was a false alert, 3000 ft of separation was established and maintained.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH ACR Y. NON ADHERENCE TO ATC INSTRUCTION. STANDARD SEPARATION EXISTED.

Narrative: THE CTLR CLBED ACR X WHEN IT CLRED ACR Y THAT WAS CONVERGING AT 8000 FT. ACR X INFORMED THE CTLR OF AN RA AND AN ALERT TO DSND. ACR X DSNDED 200 FT, ADVISED OF THE RA AND THEN CLBED TO HIS ASSIGNED ALT OF 15000 FT. THERE WAS A CLRNC DEV BY THE TCASII ACFT OF AT LEAST 200 FT. COM REGARDING THE TCASII MANEUVER TOOK PLACE AFTER THE INCIDENT. THIS WAS A FALSE ALERT, 3000 FT OF SEPARATION WAS ESTABLISHED AND MAINTAINED.

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 TCASII RA with air carrier Y. Non adherence to ATC instruction. Standard separation existed.