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A B737-400 flight crew received a TCASII RA alternating climb and descent commands prior to an near midair collision on departure from dtw.
| Attributes | |
| ACN | 450690 |
| Time | |
| Date | 199910 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dtw.airport |
| State Reference | MI |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d21.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | general aviation : personal |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | VFR |
| 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 : 11700 flight time type : 2200 |
| ASRS Report | 450690 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Departing runway 33 at dtw runway heading to 3000 ft MSL, we were switched to departure control on 126.85 at XX41Z on oct/xa/99. We were given a heading of 150 degrees when traffic appeared on TCASII, very close proximity at near same altitude. Several rapid 'climb,' 'descend,' 'climb, climb,' 'descend' RA's were observed, and I rotated the aircraft to about 28 degrees nose up pitch and 45 degree bank to the right. At this point, I saw the aircraft rg under our nose, less than 200 ft. No incident was observed.
Original NASA ASRS Text
Title: A B737-400 FLC RECEIVED A TCASII RA ALTERNATING CLB AND DSCNT COMMANDS PRIOR TO AN NMAC ON DEP FROM DTW.
Narrative: DEPARTING RWY 33 AT DTW RWY HDG TO 3000 FT MSL, WE WERE SWITCHED TO DEP CTL ON 126.85 AT XX41Z ON OCT/XA/99. WE WERE GIVEN A HDG OF 150 DEGS WHEN TFC APPEARED ON TCASII, VERY CLOSE PROX AT NEAR SAME ALT. SEVERAL RAPID 'CLB,' 'DSND,' 'CLB, CLB,' 'DSND' RA'S WERE OBSERVED, AND I ROTATED THE ACFT TO ABOUT 28 DEGS NOSE UP PITCH AND 45 DEG BANK TO THE R. AT THIS POINT, I SAW THE ACFT RG UNDER OUR NOSE, LESS THAN 200 FT. NO INCIDENT WAS OBSERVED.
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.