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Air carrier-medium large transport flight crew sighted and took action to avoid an air carrier-large transport converging at the same altitude.
| Attributes | |
| ACN | 92966 |
| Time | |
| Date | 198808 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : gdm |
| State Reference | MA |
| Altitude | msl bound lower : 5500 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : bos |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other descent : approach |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 24000 flight time type : 9100 |
| ASRS Report | 92966 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On the gardner 2 arrival to bos flying the 111 degree right level at 6000' noticed lights of an aircraft flying approximately southwest direction. However due to strato type clouds, could not determine altitude although could tell there was a convergence of the 2 aircraft. About time to ask bos approach of other aircraft approach advised large transport Y to turn to 180 degree heading and medium large transport X (us) to turn to 180 degree heading descend immediately to 5000'. Believe other aircraft was large transport, we were an medium large transport model. Definite controller error, however he actually aggravated the situation by turning both aircraft to the same heading which put the wing up into the other aircraft. We kept the other aircraft in sight, however until sufficient distance separated us.
Original NASA ASRS Text
Title: ACR-MLG FLT CREW SIGHTED AND TOOK ACTION TO AVOID AN ACR-LGT CONVERGING AT THE SAME ALT.
Narrative: ON THE GARDNER 2 ARR TO BOS FLYING THE 111 DEG R LEVEL AT 6000' NOTICED LIGHTS OF AN ACFT FLYING APPROX SW DIRECTION. HOWEVER DUE TO STRATO TYPE CLOUDS, COULD NOT DETERMINE ALT ALTHOUGH COULD TELL THERE WAS A CONVERGENCE OF THE 2 ACFT. ABOUT TIME TO ASK BOS APCH OF OTHER ACFT APCH ADVISED LGT Y TO TURN TO 180 DEG HDG AND MLG X (US) TO TURN TO 180 DEG HDG DSND IMMEDIATELY TO 5000'. BELIEVE OTHER ACFT WAS LGT, WE WERE AN MLG MODEL. DEFINITE CTLR ERROR, HOWEVER HE ACTUALLY AGGRAVATED THE SITUATION BY TURNING BOTH ACFT TO THE SAME HDG WHICH PUT THE WING UP INTO THE OTHER ACFT. WE KEPT THE OTHER ACFT IN SIGHT, HOWEVER UNTIL SUFFICIENT DISTANCE SEPARATED US.
Data retrieved from NASA's ASRS site as of August 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.