Air carrier vectored into a TCASII RA situation.

Attributes
ACN	448411
Time
Date	199909
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : bna.vortac
State Reference	TN
Altitude	msl single value : 310
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : level
Route In Use	enroute airway : j39.airway
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 180 flight time total : 8500 flight time type : 300
ASRS Report	448411
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 12000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Cruising FL310, ZTL told us to fly heading 270 degrees which was a 50 degree left turn from our on course heading. Shortly thereafter, ZTL asked us our heading, which was passing 310 degrees. At that moment, we received a TCASII alert to descend approximately 2000 FPM to avoid head-on traffic.

Original NASA ASRS Text

Title: ACR VECTORED INTO A TCASII RA SIT.

Narrative: CRUISING FL310, ZTL TOLD US TO FLY HDG 270 DEGS WHICH WAS A 50 DEG L TURN FROM OUR ON COURSE HDG. SHORTLY THEREAFTER, ZTL ASKED US OUR HDG, WHICH WAS PASSING 310 DEGS. AT THAT MOMENT, WE RECEIVED A TCASII ALERT TO DSND APPROX 2000 FPM TO AVOID HEAD-ON TFC.

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.