Potential conflict avoided by flight crew response to TCASII RA.

Attributes
ACN	261538
Time
Date	199401
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : spa
State Reference	SC
Altitude	msl bound lower : 15000 msl bound upper : 16000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute airway : ztl
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 5300 flight time type : 1800
ASRS Report	261538
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

ATC advised us of traffic at 14900 ft unverified. We were at 15000 ft in IMC conditions. Traffic converged. We got a TA on TCASII then almost immediately an RA to climb. I initiated a climb to 16000 ft and advised ATC. No traffic was seen due to the clouds. ATC said they would track the target and investigate. No heading change was offered by ATC. We had about 10 seconds from initial advice by ATC until the RA told us to climb.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT AVOIDED BY FLC RESPONSE TO TCASII RA.

Narrative: ATC ADVISED US OF TFC AT 14900 FT UNVERIFIED. WE WERE AT 15000 FT IN IMC CONDITIONS. TFC CONVERGED. WE GOT A TA ON TCASII THEN ALMOST IMMEDIATELY AN RA TO CLB. I INITIATED A CLB TO 16000 FT AND ADVISED ATC. NO TFC WAS SEEN DUE TO THE CLOUDS. ATC SAID THEY WOULD TRACK THE TARGET AND INVESTIGATE. NO HDG CHANGE WAS OFFERED BY ATC. WE HAD ABOUT 10 SECONDS FROM INITIAL ADVICE BY ATC UNTIL THE RA TOLD US TO CLB.

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.