Aircraft X non adherence to TCASII RA would have had less than standard separation from aircraft Y.

Attributes
ACN	242219
Time
Date	199305
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mrb
State Reference	WV
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : iad
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 4
ASRS Report	242219
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Aircraft X was on airway nebound at 7000 ft. Aircraft Y was nwbound at 8000 ft. I was moderately busy in an area of my sector about 30 mi east of situation. I did not have time to call traffic to aircraft X on a target (1200 code) that appeared off his 10 O'clock position indicating 6600 ft. Aircraft X informed me he had an RA and was climbing. I said, 'negative' and informed aircraft X about the aircraft Y above him at 8000. Aircraft X responded with, 'we have that traffic in sight now.' aircraft X did not climb. I also informed him of the VFR target off his left at 6600. I believe this was the target that caused his RA.

Original NASA ASRS Text

Title: ACFT X NON ADHERENCE TO TCASII RA WOULD HAVE HAD LTSS FROM ACFT Y.

Narrative: ACFT X WAS ON AIRWAY NEBOUND AT 7000 FT. ACFT Y WAS NWBOUND AT 8000 FT. I WAS MODERATELY BUSY IN AN AREA OF MY SECTOR ABOUT 30 MI E OF SIT. I DID NOT HAVE TIME TO CALL TFC TO ACFT X ON A TARGET (1200 CODE) THAT APPEARED OFF HIS 10 O'CLOCK POS INDICATING 6600 FT. ACFT X INFORMED ME HE HAD AN RA AND WAS CLBING. I SAID, 'NEGATIVE' AND INFORMED ACFT X ABOUT THE ACFT Y ABOVE HIM AT 8000. ACFT X RESPONDED WITH, 'WE HAVE THAT TFC IN SIGHT NOW.' ACFT X DID NOT CLB. I ALSO INFORMED HIM OF THE VFR TARGET OFF HIS L AT 6600. I BELIEVE THIS WAS THE TARGET THAT CAUSED HIS RA.

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.