<< >> NASA ASRS Report 278563, July 1994

TCASII RA.

Attributes
ACN	278563
Time
Date	199407
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dxo
State Reference	MI
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hou
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute airway : zob
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 : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8600 flight time type : 4100
ASRS Report	278563
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 9000
ASRS Report	278827
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were level at 13000 ft on a departure out of dtw. ZOB called VFR traffic at 10 O'clock. TCASII showed the VFR target about 500 ft above and descending and converging with our course. As the target approached 2 mi we got a RA 'descend.' we complied with the descend command and the traffic flew directly overhead with approximately 1000 ft of separation. We had descended to 12000 ft then climbed back to 13000 ft. ZOB was informed that the altitude deviation was a result of a TCASII RA.

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Original NASA ASRS Text

Title: TCASII RA.

Narrative: WE WERE LEVEL AT 13000 FT ON A DEP OUT OF DTW. ZOB CALLED VFR TFC AT 10 O'CLOCK. TCASII SHOWED THE VFR TARGET ABOUT 500 FT ABOVE AND DSNDING AND CONVERGING WITH OUR COURSE. AS THE TARGET APCHED 2 MI WE GOT A RA 'DSND.' WE COMPLIED WITH THE DSND COMMAND AND THE TFC FLEW DIRECTLY OVERHEAD WITH APPROX 1000 FT OF SEPARATION. WE HAD DSNDED TO 12000 FT THEN CLBED BACK TO 13000 FT. ZOB WAS INFORMED THAT THE ALTDEV WAS A RESULT OF A TCASII RA.

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.