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A B757-200 first officer report on a near near midair collision with opposite direction traffic 500 ft above, TCASII idented, but not on approach controller's radar at cvg, oh.
| Attributes | |
| ACN | 460360 |
| Time | |
| Date | 200001 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : 1g3.e navaid : flm.vor |
| State Reference | KY |
| Altitude | msl single value : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : cvg.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : ns |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | arrival : profile descent enroute airway : v17.airway |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 220 flight time total : 29000 flight time type : 900 |
| ASRS Report | 460360 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe airspace violation : entry altitude deviation : overshoot conflict : airborne critical non adherence : far non adherence : company policies non adherence : published procedure |
| Independent Detector | aircraft equipment : tcas |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft ATC Human Performance |
| Primary Problem | Aircraft |
Narrative:
While under control of cvg approach, level at 11000 ft, just northwest of flm VORTAC at night, we suddenly got a TA followed very quickly by an RA. We both saw TA followed by RA on the center radar/TCASII CRT. No climb or descent noted from traffic, heading southeast at 11500 ft. We quickly visually saw aircraft above and ahead. RA said to descend. I told cvg approach about RA. They said that they did not have any traffic on radar near us. I again said what we saw on TCASII visually. RA changed to TA as plane went over us and subsequently changed to 'non conflict' traffic. Cvg approach then stated they could see a 'primary target.' they then passed our 11500 ft report to others behind us on the arrival. The unidented aircraft was going southeast on V517 -- proper direction/altitude for VFR. Top of cvg class B airspace is 8000 ft. Did unidented aircraft have very weak transponder? Was its antenna 'aimed' forward? Ie, antenna hidden from 'aft' radar site? Perhaps approach should use 12000 ft or 10000 ft instead of 'wrong way' 11000 ft? Was/were one or both xponders working improperly?
Original NASA ASRS Text
Title: A B757-200 FO RPT ON A NEAR NMAC WITH OPPOSITE DIRECTION TFC 500 FT ABOVE, TCASII IDENTED, BUT NOT ON APCH CTLR'S RADAR AT CVG, OH.
Narrative: WHILE UNDER CTL OF CVG APCH, LEVEL AT 11000 FT, JUST NW OF FLM VORTAC AT NIGHT, WE SUDDENLY GOT A TA FOLLOWED VERY QUICKLY BY AN RA. WE BOTH SAW TA FOLLOWED BY RA ON THE CTR RADAR/TCASII CRT. NO CLB OR DSCNT NOTED FROM TFC, HDG SE AT 11500 FT. WE QUICKLY VISUALLY SAW ACFT ABOVE AND AHEAD. RA SAID TO DSND. I TOLD CVG APCH ABOUT RA. THEY SAID THAT THEY DID NOT HAVE ANY TFC ON RADAR NEAR US. I AGAIN SAID WHAT WE SAW ON TCASII VISUALLY. RA CHANGED TO TA AS PLANE WENT OVER US AND SUBSEQUENTLY CHANGED TO 'NON CONFLICT' TFC. CVG APCH THEN STATED THEY COULD SEE A 'PRIMARY TARGET.' THEY THEN PASSED OUR 11500 FT RPT TO OTHERS BEHIND US ON THE ARR. THE UNIDENTED ACFT WAS GOING SE ON V517 -- PROPER DIRECTION/ALT FOR VFR. TOP OF CVG CLASS B AIRSPACE IS 8000 FT. DID UNIDENTED ACFT HAVE VERY WEAK XPONDER? WAS ITS ANTENNA 'AIMED' FORWARD? IE, ANTENNA HIDDEN FROM 'AFT' RADAR SITE? PERHAPS APCH SHOULD USE 12000 FT OR 10000 FT INSTEAD OF 'WRONG WAY' 11000 FT? WAS/WERE ONE OR BOTH XPONDERS WORKING IMPROPERLY?
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.