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A VFR cpr medium large transport caused an IFR air carrier medium large transport to deviate from its assigned altitude due to a TCASII command.
| Attributes | |
| ACN | 239316 |
| Time | |
| Date | 199304 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : etx |
| State Reference | PA |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute airway : zny |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 100 flight time total : 7600 flight time type : 2500 |
| ASRS Report | 239316 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 17000 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were tracking southwest (heading 260 degrees) on V162 from etx VOR at 16000 ft. ZNY requested a right turn to heading 120 degrees. Being a clear VFR day and only about 25 mi from our destination, we told center to cancel the IFR, we are leaving 16000 ft on our descent. Center replied, IFR cancelled, squawk 1200. At about that time I saw an air carrier medium large transport climbing from our left to right and a little below. I turned about 20 degrees to the left and went behind the medium large transport. The medium large transport called center that they had a TCASII warning and were descending in a right turn. He reported a TCASII traffic warning of 200 ft and 3 mi. The medium large transport never saw us visually. ZNY never gave traffic warnings to either one of us, had ZNY advised us of the reason for the turn to 120 degree heading, I would have held onto the IFR clearance. Very often, from this direction, we receive turns because a handoff to harrisburg approach has not been completed. I think center needs to communicate better as to the reasons for off course vectors. Also, airlines are relying on TCASII too much instead of see and be seen.
Original NASA ASRS Text
Title: A VFR CPR MLG CAUSED AN IFR ACR MLG TO DEVIATE FROM ITS ASSIGNED ALT DUE TO A TCASII COMMAND.
Narrative: WE WERE TRACKING SW (HDG 260 DEGS) ON V162 FROM ETX VOR AT 16000 FT. ZNY REQUESTED A R TURN TO HDG 120 DEGS. BEING A CLR VFR DAY AND ONLY ABOUT 25 MI FROM OUR DEST, WE TOLD CTR TO CANCEL THE IFR, WE ARE LEAVING 16000 FT ON OUR DSCNT. CTR REPLIED, IFR CANCELLED, SQUAWK 1200. AT ABOUT THAT TIME I SAW AN ACR MLG CLBING FROM OUR L TO R AND A LITTLE BELOW. I TURNED ABOUT 20 DEGS TO THE L AND WENT BEHIND THE MLG. THE MLG CALLED CTR THAT THEY HAD A TCASII WARNING AND WERE DSNDING IN A R TURN. HE RPTED A TCASII TFC WARNING OF 200 FT AND 3 MI. THE MLG NEVER SAW US VISUALLY. ZNY NEVER GAVE TFC WARNINGS TO EITHER ONE OF US, HAD ZNY ADVISED US OF THE REASON FOR THE TURN TO 120 DEG HDG, I WOULD HAVE HELD ONTO THE IFR CLRNC. VERY OFTEN, FROM THIS DIRECTION, WE RECEIVE TURNS BECAUSE A HDOF TO HARRISBURG APCH HAS NOT BEEN COMPLETED. I THINK CTR NEEDS TO COMMUNICATE BETTER AS TO THE REASONS FOR OFF COURSE VECTORS. ALSO, AIRLINES ARE RELYING ON TCASII TOO MUCH INSTEAD OF SEE AND BE SEEN.
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.