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A C550 climbing through 9500 ft got a TCAS TA alert; descended to 9000 ft to miss a VFR citation jet passing overhead by approximately 300 ft.
| Attributes | |
| ACN | 699265 |
| Time | |
| Date | 200605 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ack.airport |
| State Reference | MA |
| Altitude | msl single value : 9500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : k90.tracon tower : ewr.tower |
| Operator | general aviation : corporate |
| Make Model Name | Citation II S2/Bravo |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna Citation Undifferentiated or Other Model |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | VFR |
| Person 1 | |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 10000 flight time type : 400 |
| ASRS Report | 699265 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 0 vertical : 300 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Climbing out of ack to FL220. At 8900 ft; I noticed a TCAS target at our 3 O'clock position; same altitude. The target was close in (less than 1 mi) converging at 30 degree angle. We acquired aircraft visually and at 9500 ft MSL began a pushover to 9000 ft MSL. The aircraft passed overhead TCAS indicating +300 ft. The aircraft was a CJ1 or CJ2 and was not controled by ATC. We observed aircraft pass through a broken to overcast cloud layer at approximately 12000 ft MSL. We notified ATC of the event and resumed our climb to FL220.
Original NASA ASRS Text
Title: A C550 CLBING THROUGH 9500 FT GOT A TCAS TA ALERT; DSNDED TO 9000 FT TO MISS A VFR CITATION JET PASSING OVERHEAD BY APPROX 300 FT.
Narrative: CLBING OUT OF ACK TO FL220. AT 8900 FT; I NOTICED A TCAS TARGET AT OUR 3 O'CLOCK POS; SAME ALT. THE TARGET WAS CLOSE IN (LESS THAN 1 MI) CONVERGING AT 30 DEG ANGLE. WE ACQUIRED ACFT VISUALLY AND AT 9500 FT MSL BEGAN A PUSHOVER TO 9000 FT MSL. THE ACFT PASSED OVERHEAD TCAS INDICATING +300 FT. THE ACFT WAS A CJ1 OR CJ2 AND WAS NOT CTLED BY ATC. WE OBSERVED ACFT PASS THROUGH A BROKEN TO OVCST CLOUD LAYER AT APPROX 12000 FT MSL. WE NOTIFIED ATC OF THE EVENT AND RESUMED OUR CLB TO FL220.
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.