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Air carrier mdt responded to a TCASII command to climb while in a descent. ATC issued turn instructions that were not heard because of the overriding TCASII command. The other aircraft was not seen visually.
| Attributes | |
| ACN | 206947 |
| Time | |
| Date | 199204 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : pwl |
| State Reference | NY |
| Altitude | msl bound lower : 6600 msl bound upper : 7200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute airway : zbw enroute other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 3060 |
| ASRS Report | 206947 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We had just rolled out of turn over pwl VOR (V-44 sbound) in a descent out of 6800 to cross loves intersection at 6000. During turn, ATC had called unconfirmed VFR traffic at 2:30 below us. Traffic appeared on TCASII as 800 ft below, climbing. I reduced descent while first officer visually searched. TCASII issued TA (intruder). ATC began to issue an avoidance turn but it was drowned out by the TCASII RA (threat) announcing 'climb, climb.' I climbed straight ahead at the indicated rate from 6600 to 7200 at which point the TCASII announced 'clear of conflict.' the first officer sighted the threat aircraft just as the TA was announced. He notified ATC of our climb resolution.
Original NASA ASRS Text
Title: ACR MDT RESPONDED TO A TCASII COMMAND TO CLB WHILE IN A DSCNT. ATC ISSUED TURN INSTRUCTIONS THAT WERE NOT HEARD BECAUSE OF THE OVERRIDING TCASII COMMAND. THE OTHER ACFT WAS NOT SEEN VISUALLY.
Narrative: WE HAD JUST ROLLED OUT OF TURN OVER PWL VOR (V-44 SBOUND) IN A DSCNT OUT OF 6800 TO CROSS LOVES INTXN AT 6000. DURING TURN, ATC HAD CALLED UNCONFIRMED VFR TFC AT 2:30 BELOW US. TFC APPEARED ON TCASII AS 800 FT BELOW, CLBING. I REDUCED DSCNT WHILE FO VISUALLY SEARCHED. TCASII ISSUED TA (INTRUDER). ATC BEGAN TO ISSUE AN AVOIDANCE TURN BUT IT WAS DROWNED OUT BY THE TCASII RA (THREAT) ANNOUNCING 'CLB, CLB.' I CLBED STRAIGHT AHEAD AT THE INDICATED RATE FROM 6600 TO 7200 AT WHICH POINT THE TCASII ANNOUNCED 'CLR OF CONFLICT.' THE FO SIGHTED THE THREAT ACFT JUST AS THE TA WAS ANNOUNCED. HE NOTIFIED ATC OF OUR CLB RESOLUTION.
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.