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An arriving commuter CL65 aircraft at 5000 ft received a TCASII TA, then RA on conflicting IFR traffic and initiated a climb. The other aircraft passed 100 ft below the CL65 resulting in loss of separation.
| Attributes | |
| ACN | 414509 |
| Time | |
| Date | 199809 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : roa |
| State Reference | VA |
| Altitude | msl bound lower : 5000 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : roa |
| Operator | common carrier : air carrier |
| Make Model Name | Challenger CL604 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 16800 flight time type : 200 |
| ASRS Report | 414509 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On descent to 5000 ft under approach control at roa, we received a TA. Pulling up TCASII screen, I located the aircraft with 5 mi at 5000 ft. Shortly after that, we received a 'climb' RA. We added power and began a climb at a minimum of 2000 FPM. Last observed vertical clearance before climb observed was - 100 ft. Upon clear of conflict message, returned to original heading and advised roa approach. Discussions with roa approach on phone indicated that the error was in approach control as 2 aircraft were cleared to same altitude.
Original NASA ASRS Text
Title: AN ARRIVING COMMUTER CL65 ACFT AT 5000 FT RECEIVED A TCASII TA, THEN RA ON CONFLICTING IFR TFC AND INITIATED A CLB. THE OTHER ACFT PASSED 100 FT BELOW THE CL65 RESULTING IN LOSS OF SEPARATION.
Narrative: ON DSCNT TO 5000 FT UNDER APCH CTL AT ROA, WE RECEIVED A TA. PULLING UP TCASII SCREEN, I LOCATED THE ACFT WITH 5 MI AT 5000 FT. SHORTLY AFTER THAT, WE RECEIVED A 'CLB' RA. WE ADDED PWR AND BEGAN A CLB AT A MINIMUM OF 2000 FPM. LAST OBSERVED VERT CLRNC BEFORE CLB OBSERVED WAS - 100 FT. UPON CLR OF CONFLICT MESSAGE, RETURNED TO ORIGINAL HDG AND ADVISED ROA APCH. DISCUSSIONS WITH ROA APCH ON PHONE INDICATED THAT THE ERROR WAS IN APCH CTL AS 2 ACFT WERE CLRED TO SAME ALT.
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.