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Medium large transport on descent within class B airspace has near midair collision with small transport.
| Attributes | |
| ACN | 280593 |
| Time | |
| Date | 199408 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : aml |
| State Reference | VA |
| Altitude | msl bound lower : 10000 msl bound upper : 10300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad tower : lax |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | King Air C90 E90 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 900 |
| ASRS Report | 280593 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were inbound to dulles heading 150 degrees (iad) approximately 15 mi away and at 11000 ft. Approach (120.45) gave us a descent to 5000 ft. At approximately 10500 ft we got a TCASII warning of traffic and it showed traffic at our 1 O'clock position 700 ft below. TCASII told us to climb. We stopped/shallowed our descent and started a slow left turn. When we saw the traffic, it was a king air and passed above us by no more than 300 ft. Traffic was never called by approach and it's a good thing we didn't climb, because in my opinion, we would have climbed into the traffic. The aircraft and I wouldn't be writing this report. I questioned approach about the aircraft and she said it was VFR and just popped up.
Original NASA ASRS Text
Title: MLG ON DSCNT WITHIN CLASS B AIRSPACE HAS NMAC WITH SMT.
Narrative: WE WERE INBOUND TO DULLES HDG 150 DEGS (IAD) APPROX 15 MI AWAY AND AT 11000 FT. APCH (120.45) GAVE US A DSCNT TO 5000 FT. AT APPROX 10500 FT WE GOT A TCASII WARNING OF TFC AND IT SHOWED TFC AT OUR 1 O'CLOCK POS 700 FT BELOW. TCASII TOLD US TO CLB. WE STOPPED/SHALLOWED OUR DSCNT AND STARTED A SLOW L TURN. WHEN WE SAW THE TFC, IT WAS A KING AIR AND PASSED ABOVE US BY NO MORE THAN 300 FT. TFC WAS NEVER CALLED BY APCH AND IT'S A GOOD THING WE DIDN'T CLB, BECAUSE IN MY OPINION, WE WOULD HAVE CLBED INTO THE TFC. THE ACFT AND I WOULDN'T BE WRITING THIS RPT. I QUESTIONED APCH ABOUT THE ACFT AND SHE SAID IT WAS VFR AND JUST POPPED UP.
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.