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DHC8 crew uses captain authority/authorized to avoid cell during approach in windshear and turbulence at mco.
| Attributes | |
| ACN | 439913 |
| Time | |
| Date | 199906 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mco.airport |
| State Reference | FL |
| Altitude | msl bound lower : 2500 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence Thunderstorm Windshear |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mco.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Navigation In Use | ils localizer & glide slope : 35 |
| Flight Phase | descent : holding |
| Route In Use | approach : instrument precision |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 12000 flight time type : 10000 |
| ASRS Report | 439913 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | controller : developmental pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | inflight encounter : turbulence inflight encounter : weather non adherence : far non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment other atc equipment : ns aircraft equipment other aircraft equipment : ns other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor ATC Human Performance Weather |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
WX was moving west to east across approach path ILS runway 35 mco. I turned from 360 degrees to 090 degrees to avoid severe WX after getting a 20-50 KT windshear on ILS, and due to frequency congestion due to a non essential pilot/controller discussion, had to turn and then tell ATC. Due to similar call signs, another aircraft answered our ATC transmission, and a discussion evolved. We were on the ILS, ATC canceled our approach clearance, and gave us holding instructions at the OM. Before I could request immediate turn to 090 degrees to avoid WX, another aircraft responded to the transmission and a discussion evolved lasting approximately 30 seconds. We had already experienced a 70 KT windshear and were in moderate turbulence. I could not communicate with ATC, so instructed the first officer to turn to 090 degrees to avoid severe WX. When the frequency was clear, we advised ATC of our action, and the reason. Something must be done to improve pilot/controller communication -- especially during critical phases of flight.
Original NASA ASRS Text
Title: DHC8 CREW USES CAPT AUTH TO AVOID CELL DURING APCH IN WINDSHEAR AND TURB AT MCO.
Narrative: WX WAS MOVING W TO E ACROSS APCH PATH ILS RWY 35 MCO. I TURNED FROM 360 DEGS TO 090 DEGS TO AVOID SEVERE WX AFTER GETTING A 20-50 KT WINDSHEAR ON ILS, AND DUE TO FREQ CONGESTION DUE TO A NON ESSENTIAL PLT/CTLR DISCUSSION, HAD TO TURN AND THEN TELL ATC. DUE TO SIMILAR CALL SIGNS, ANOTHER ACFT ANSWERED OUR ATC XMISSION, AND A DISCUSSION EVOLVED. WE WERE ON THE ILS, ATC CANCELED OUR APCH CLRNC, AND GAVE US HOLDING INSTRUCTIONS AT THE OM. BEFORE I COULD REQUEST IMMEDIATE TURN TO 090 DEGS TO AVOID WX, ANOTHER ACFT RESPONDED TO THE XMISSION AND A DISCUSSION EVOLVED LASTING APPROX 30 SECONDS. WE HAD ALREADY EXPERIENCED A 70 KT WINDSHEAR AND WERE IN MODERATE TURB. I COULD NOT COMMUNICATE WITH ATC, SO INSTRUCTED THE FO TO TURN TO 090 DEGS TO AVOID SEVERE WX. WHEN THE FREQ WAS CLR, WE ADVISED ATC OF OUR ACTION, AND THE REASON. SOMETHING MUST BE DONE TO IMPROVE PLT/CTLR COM -- ESPECIALLY DURING CRITICAL PHASES OF FLT.
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.