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ZDC controller described conflict incident when VFR aircraft declined controller's request to alter descent and conflicted with air carrier at 10000 ft.
| Attributes | |
| ACN | 739573 |
| Time | |
| Date | 200704 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zdc.artcc |
| State Reference | VA |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | general aviation : personal |
| Make Model Name | PA-46 Malibu |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | VFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 12 |
| ASRS Report | 739573 |
| Events | |
| Anomaly | conflict : airborne critical |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert controller : issued advisory |
| Miss Distance | horizontal : 12000 vertical : 300 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
PA46 entered kenton (53) sector VFR/165 going direct destination (esn). His profile descent took him through phl arrival traffic on dupont arrival. I advised PA46 to remain at or above VFR/125 til clear. He advised on profile and would not stop descent; 'that's what I have eyeballs and TCAS for;' were his exact words. His descent was putting him head on with B737 who was leveling at 10000 ft and being handed off to phl. I called traffic to both and advised PA46 to stop descent at 10500 ft. He refused; again telling me he's on a profile descent. I told him (this time I didn't advise) to expedite his descent for traffic and again called traffic to B737. When B737 responded; I heard his TCAS and he climbed about 600 ft. When it was over; I advised PA46 that; on profile or not; what he did was dangerous and that he caused an airliner on an IFR clearance to take action. He simply responded 'roger.' PA46 has done this exact move in the same place before. Last time; he blatantly descended through a phl holding pattern causing 2 aircraft to change their altitude (for the RA) and loss of separation.
Original NASA ASRS Text
Title: ZDC CTLR DESCRIBED CONFLICT INCIDENT WHEN VFR ACFT DECLINED CTLR'S REQUEST TO ALTER DESCENT AND CONFLICTED WITH ACR AT 10000 FT.
Narrative: PA46 ENTERED KENTON (53) SECTOR VFR/165 GOING DIRECT DEST (ESN). HIS PROFILE DSCNT TOOK HIM THROUGH PHL ARR TFC ON DUPONT ARR. I ADVISED PA46 TO REMAIN AT OR ABOVE VFR/125 TIL CLR. HE ADVISED ON PROFILE AND WOULD NOT STOP DSCNT; 'THAT'S WHAT I HAVE EYEBALLS AND TCAS FOR;' WERE HIS EXACT WORDS. HIS DSCNT WAS PUTTING HIM HEAD ON WITH B737 WHO WAS LEVELING AT 10000 FT AND BEING HANDED OFF TO PHL. I CALLED TFC TO BOTH AND ADVISED PA46 TO STOP DSCNT AT 10500 FT. HE REFUSED; AGAIN TELLING ME HE'S ON A PROFILE DSCNT. I TOLD HIM (THIS TIME I DIDN'T ADVISE) TO EXPEDITE HIS DSCNT FOR TFC AND AGAIN CALLED TFC TO B737. WHEN B737 RESPONDED; I HEARD HIS TCAS AND HE CLBED ABOUT 600 FT. WHEN IT WAS OVER; I ADVISED PA46 THAT; ON PROFILE OR NOT; WHAT HE DID WAS DANGEROUS AND THAT HE CAUSED AN AIRLINER ON AN IFR CLRNC TO TAKE ACTION. HE SIMPLY RESPONDED 'ROGER.' PA46 HAS DONE THIS EXACT MOVE IN THE SAME PLACE BEFORE. LAST TIME; HE BLATANTLY DSNDED THROUGH A PHL HOLDING PATTERN CAUSING 2 ACFT TO CHANGE THEIR ALT (FOR THE RA) AND LOSS OF SEPARATION.
Data retrieved from NASA's ASRS site as of January 2009 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.