<< >> NASA ASRS Report 368038, May 1997

Super 80 gets a late TA from approach controller on traffic at 5500 ft at aus. Medium large transport was out of 6000 ft in descent. TCASII climb resolution failed when the VFR aircraft climbed towards medium large transport. S80 dove to avoid near midair collision, following TCASII new commands.

Attributes
ACN	368038
Time
Date	199705
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : aus
State Reference	TX
Altitude	msl bound lower : 5000 msl bound upper : 6000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : aus
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
ASRS Report	368038
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	368039
Events
Anomaly	altitude deviation : undershoot conflict : nmac non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

We were cleared to 5000 ft by austin approach. As we descended through 6000 ft, approach called and told us maintain 6000 ft and called traffic at 5500 ft. We advised ATC that we had already descended through 6000 ft and would climb back to 6000 ft. As we began pitch reversal, TCASII called traffic and advised us to monitor vertical speed. We complied and spotted traffic at about 2 O'clock. The traffic then began a climbing turn towards us. Traffic passed over and behind us. A call to supervisor at austin approach control confirmed the events. ATC was not working the intruder aircraft at the time. Supplemental information from acn 368039: TCASII then commanded a descend RA to which we immediately complied.

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Original NASA ASRS Text

Title: SUPER 80 GETS A LATE TA FROM APCH CTLR ON TFC AT 5500 FT AT AUS. MLG WAS OUT OF 6000 FT IN DSCNT. TCASII CLB RESOLUTION FAILED WHEN THE VFR ACFT CLBED TOWARDS MLG. S80 DOVE TO AVOID NMAC, FOLLOWING TCASII NEW COMMANDS.

Narrative: WE WERE CLRED TO 5000 FT BY AUSTIN APCH. AS WE DSNDED THROUGH 6000 FT, APCH CALLED AND TOLD US MAINTAIN 6000 FT AND CALLED TFC AT 5500 FT. WE ADVISED ATC THAT WE HAD ALREADY DSNDED THROUGH 6000 FT AND WOULD CLB BACK TO 6000 FT. AS WE BEGAN PITCH REVERSAL, TCASII CALLED TFC AND ADVISED US TO MONITOR VERT SPD. WE COMPLIED AND SPOTTED TFC AT ABOUT 2 O'CLOCK. THE TFC THEN BEGAN A CLBING TURN TOWARDS US. TFC PASSED OVER AND BEHIND US. A CALL TO SUPVR AT AUSTIN APCH CTL CONFIRMED THE EVENTS. ATC WAS NOT WORKING THE INTRUDER ACFT AT THE TIME. SUPPLEMENTAL INFO FROM ACN 368039: TCASII THEN COMMANDED A DSND RA TO WHICH WE IMMEDIATELY COMPLIED.

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.