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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier mdt PIC performs evasive action climb maneuver in response to a TCASII resolution alert to unknown VFR traffic in area.
| Attributes | |
| ACN | 180299 |
| Time | |
| Date | 199105 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : hpn |
| State Reference | NY |
| Altitude | msl bound lower : 3000 msl bound upper : 3350 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | cruise other cruise other descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 20900 flight time type : 2800 |
| ASRS Report | 180299 |
| 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 non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
We were at 3000' MSL being radar vectored for an ILS to runway 16 at white plains, ny. Ny approach called VFR traffic at 10 O'clock, 2500', at the same time we got a TCAS alert and the TCAS showed the traffic 500' below us. We looked for the traffic, but couldn't see it due to the thick haze. The TCAS issued a RA to climb immediately, the TCAS now showed the traffic 400' below us. We advised ny approach that we were responding to a TCAS command and climbing. We climbed to 3350' to be halfway between the traffic below us and other traffic at 4000'. As soon as the TCAS showed clear of conflict we immediately descended back to 3000' MSL.
Original NASA ASRS Text
Title: ACR MDT PIC PERFORMS EVASIVE ACTION CLIMB MANEUVER IN RESPONSE TO A TCASII RESOLUTION ALERT TO UNKNOWN VFR TRAFFIC IN AREA.
Narrative: WE WERE AT 3000' MSL BEING RADAR VECTORED FOR AN ILS TO RWY 16 AT WHITE PLAINS, NY. NY APCH CALLED VFR TFC AT 10 O'CLOCK, 2500', AT THE SAME TIME WE GOT A TCAS ALERT AND THE TCAS SHOWED THE TFC 500' BELOW US. WE LOOKED FOR THE TFC, BUT COULDN'T SEE IT DUE TO THE THICK HAZE. THE TCAS ISSUED A RA TO CLB IMMEDIATELY, THE TCAS NOW SHOWED THE TFC 400' BELOW US. WE ADVISED NY APCH THAT WE WERE RESPONDING TO A TCAS COMMAND AND CLBING. WE CLBED TO 3350' TO BE HALFWAY BTWN THE TFC BELOW US AND OTHER TFC AT 4000'. AS SOON AS THE TCAS SHOWED CLR OF CONFLICT WE IMMEDIATELY DSNDED BACK TO 3000' MSL.
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.