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Flight crew of a DC9 turned and descended in response to a TCASII RA during a STAR arrival descent. Approach radar controller advised that the traffic just 'popped up' on their screen.
| Attributes | |
| ACN | 408240 |
| Time | |
| Date | 199807 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dxo airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 11000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : dtw |
| 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 : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 11000 flight time type : 4000 |
| ASRS Report | 408240 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
TCASII alert. VFR traffic popped up on TCASII within 3 mi of aircraft. I happened to be looking at TCASII at time and told first officer to begin left turn. We then had TCASII alert (RA) and descended to 11000 ft. Never saw traffic. Controller said traffic popped up about time I called him. Missed by 300 ft and 1 mi.
Original NASA ASRS Text
Title: FLC OF A DC9 TURNED AND DSNDED IN RESPONSE TO A TCASII RA DURING A STAR ARR DSCNT. APCH RADAR CTLR ADVISED THAT THE TFC JUST 'POPPED UP' ON THEIR SCREEN.
Narrative: TCASII ALERT. VFR TFC POPPED UP ON TCASII WITHIN 3 MI OF ACFT. I HAPPENED TO BE LOOKING AT TCASII AT TIME AND TOLD FO TO BEGIN L TURN. WE THEN HAD TCASII ALERT (RA) AND DSNDED TO 11000 FT. NEVER SAW TFC. CTLR SAID TFC POPPED UP ABOUT TIME I CALLED HIM. MISSED BY 300 FT AND 1 MI.
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.