Medium large transport on descent to land has TCASII RA to climb.

Attributes
ACN	273628
Time
Date	199406
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : irw
State Reference	OK
Altitude	msl bound lower : 4000 msl bound upper : 4500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : okc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
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 : 15000 flight time type : 400
ASRS Report	273628
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Descending to land at okc at 4000 ft. TCASII system gave us traffic information as well as ATC traffic information on target. We had no visual contact and complied with TCASII RA command to climb 500 ft. ATC gave us a 30 degree heading change about the same time as the RA. We informed ATC we were leaving 4000 ft with a TCASII RA command. We had visual contact with small cessna aircraft at our 4 O'clock position as he went by at 4000 ft MSL, opposite direction. We returned to 4000 ft when clear of traffic. TCASII system worked great.

Original NASA ASRS Text

Title: MLG ON DSCNT TO LAND HAS TCASII RA TO CLB.

Narrative: DSNDING TO LAND AT OKC AT 4000 FT. TCASII SYS GAVE US TFC INFO AS WELL AS ATC TFC INFO ON TARGET. WE HAD NO VISUAL CONTACT AND COMPLIED WITH TCASII RA COMMAND TO CLB 500 FT. ATC GAVE US A 30 DEG HDG CHANGE ABOUT THE SAME TIME AS THE RA. WE INFORMED ATC WE WERE LEAVING 4000 FT WITH A TCASII RA COMMAND. WE HAD VISUAL CONTACT WITH SMALL CESSNA ACFT AT OUR 4 O'CLOCK POS AS HE WENT BY AT 4000 FT MSL, OPPOSITE DIRECTION. WE RETURNED TO 4000 FT WHEN CLR OF TFC. TCASII SYS WORKED GREAT.

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.