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Near midair collision between AC-650 in cruise and a departure, climbing light GA twin 20 north of hya, ma.
| Attributes | |
| ACN | 585837 |
| Time | |
| Date | 200306 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : hya.airport |
| State Reference | MA |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : k90.tracon tower : lax.tower |
| Operator | general aviation : corporate |
| Make Model Name | Citation III, VI, VII |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : k90.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 9000 flight time type : 1000 |
| ASRS Report | 585837 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 500 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Facility ATC Human Performance Airspace Structure Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
About 20 mi north of hya, at an altitude of 4000 ft, the TCASII gave an alert of 'traffic' 'traffic'. We observed a target on the mfd which indicated 12 O'clock 2 mi and 300 ft below us. Looking up, I observed a light twin propeller at 12 O'clock 1/2 mi opposite direction at our altitude. Simultaneously, we received an RA of 'climb' 'climb' and we climbed to about 4400 ft and turned slightly left to avoid a definite mid-air collision. As we were in this evasive maneuver, ATC issued traffic at 1 O'clock 2 mi and sbound and we could hear the conflict alert alarm in his backgnd. I advised him of where the aircraft was actually located and our RA reactions.
Original NASA ASRS Text
Title: NMAC BTWN AC-650 IN CRUISE AND A DEP, CLBING LIGHT GA TWIN 20 N OF HYA, MA.
Narrative: ABOUT 20 MI N OF HYA, AT AN ALT OF 4000 FT, THE TCASII GAVE AN ALERT OF 'TFC' 'TFC'. WE OBSERVED A TARGET ON THE MFD WHICH INDICATED 12 O'CLOCK 2 MI AND 300 FT BELOW US. LOOKING UP, I OBSERVED A LIGHT TWIN PROP AT 12 O'CLOCK 1/2 MI OPPOSITE DIRECTION AT OUR ALT. SIMULTANEOUSLY, WE RECEIVED AN RA OF 'CLB' 'CLB' AND WE CLBED TO ABOUT 4400 FT AND TURNED SLIGHTLY L TO AVOID A DEFINITE MID-AIR COLLISION. AS WE WERE IN THIS EVASIVE MANEUVER, ATC ISSUED TFC AT 1 O'CLOCK 2 MI AND SBOUND AND WE COULD HEAR THE CONFLICT ALERT ALARM IN HIS BACKGND. I ADVISED HIM OF WHERE THE ACFT WAS ACTUALLY LOCATED AND OUR RA REACTIONS.
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.