Flight crew of an light transport descended in response to a TCASII RA resulting in a near midair co...

Attributes
ACN	319924
Time
Date	199510
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : irq airport : clt
State Reference	SC
Altitude	msl bound lower : 7500 msl bound upper : 8000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other cruise other
Route In Use	enroute airway : clt
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 235 flight time total : 7300 flight time type : 5400
ASRS Report	319924
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 100 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While in cruise to ags from clt at 8000 ft, flying to the colliers VOR (75 mi northeast), we received a traffic call from ATC (charlotte departure). They told us we had traffic at our 2 O'clock position, 1000 ft above us at 9000 ft. We were in and out of clouds at 8000 ft and did not see any traffic. Shortly after this, the traffic appeared on TCASII and was descending. The traffic was 800 ft above us when it first appeared on TCASII. We received a 'descend' RA from TCASII and immediately began a descent at approximately 1500 FPM. I notified ATC of our situation and they agreed with what we were doing and added, 'expedite descent!' according to TCASII, we missed the target by 300 ft vertically and less than 100 ft horizontally. We notified ATC when clear of the conflict and they (charlotte departure) cleared us back to our previous altitude. We felt we performed as we should have and we were pleased with the operation of our TCASII as well.

Original NASA ASRS Text

Title: FLC OF AN LTT DSNDED IN RESPONSE TO A TCASII RA RESULTING IN A NMAC.

Narrative: WHILE IN CRUISE TO AGS FROM CLT AT 8000 FT, FLYING TO THE COLLIERS VOR (75 MI NE), WE RECEIVED A TFC CALL FROM ATC (CHARLOTTE DEP). THEY TOLD US WE HAD TFC AT OUR 2 O'CLOCK POS, 1000 FT ABOVE US AT 9000 FT. WE WERE IN AND OUT OF CLOUDS AT 8000 FT AND DID NOT SEE ANY TFC. SHORTLY AFTER THIS, THE TFC APPEARED ON TCASII AND WAS DSNDING. THE TFC WAS 800 FT ABOVE US WHEN IT FIRST APPEARED ON TCASII. WE RECEIVED A 'DSND' RA FROM TCASII AND IMMEDIATELY BEGAN A DSCNT AT APPROX 1500 FPM. I NOTIFIED ATC OF OUR SITUATION AND THEY AGREED WITH WHAT WE WERE DOING AND ADDED, 'EXPEDITE DSCNT!' ACCORDING TO TCASII, WE MISSED THE TARGET BY 300 FT VERTLY AND LESS THAN 100 FT HORIZLY. WE NOTIFIED ATC WHEN CLR OF THE CONFLICT AND THEY (CHARLOTTE DEP) CLRED US BACK TO OUR PREVIOUS ALT. WE FELT WE PERFORMED AS WE SHOULD HAVE AND WE WERE PLEASED WITH THE OP OF OUR TCASII AS WELL.

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.

Flight crew of an light transport descended in response to a TCASII RA resulting in a near midair collision.