<< >> NASA ASRS Report 416020, October 1998

Flight crew of DC9 has TCASII RA. Traffic sighted below about 400 ft. They responded to the RA and climbed.

Attributes
ACN	416020
Time
Date	199810
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 11000 msl bound upper : 11400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl tower : sdq
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 450 flight time total : 11000 flight time type : 5000
ASRS Report	416020
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 15000 vertical : 300
Supplementary
Air Traffic Incident	other

Narrative:

Atl approach had us at 11000 ft on 120 degree heading, turning 090 degrees. In the turn, there was VFR traffic 2 O'clock, 400 ft below us. VFR traffic then showed a climb to within 200 ft and our TCASII produced an RA. First officer looked out the window and saw a cessna 182RG in the same position as TCASII showed it. I followed the TCASII advisory and climbed 400 ft. We then advised ATC of our advisory. He said '...don't know your company procedures, but there was proper separation.' we then continued into atl. I called supervisor and explained that we always follow an RA unless a greater emergency. He was not the original controller, but was going to talk to him. Supervisor was a great guy!

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Original NASA ASRS Text

Title: FLC OF DC9 HAS TCASII RA. TFC SIGHTED BELOW ABOUT 400 FT. THEY RESPONDED TO THE RA AND CLBED.

Narrative: ATL APCH HAD US AT 11000 FT ON 120 DEG HDG, TURNING 090 DEGS. IN THE TURN, THERE WAS VFR TFC 2 O'CLOCK, 400 FT BELOW US. VFR TFC THEN SHOWED A CLB TO WITHIN 200 FT AND OUR TCASII PRODUCED AN RA. FO LOOKED OUT THE WINDOW AND SAW A CESSNA 182RG IN THE SAME POS AS TCASII SHOWED IT. I FOLLOWED THE TCASII ADVISORY AND CLBED 400 FT. WE THEN ADVISED ATC OF OUR ADVISORY. HE SAID '...DON'T KNOW YOUR COMPANY PROCS, BUT THERE WAS PROPER SEPARATION.' WE THEN CONTINUED INTO ATL. I CALLED SUPVR AND EXPLAINED THAT WE ALWAYS FOLLOW AN RA UNLESS A GREATER EMER. HE WAS NOT THE ORIGINAL CTLR, BUT WAS GOING TO TALK TO HIM. SUPVR WAS A GREAT GUY!

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.