On Monday, July 11, 1988, between 2207 and 2213 UTC (16:07-16:13 MDT), four successive United flights had inadvertent encounters with microburst windshear conditions while on final approach to Denver Stapleton Airport (DEN), each resulting in a missed approach, subsequent delay, and uneventful arrival. A fifth flight executed a missed approach without encountering the phenomena. All of the flight crews were trained utilizing the resources of the Windshear Training Aid. There was no damage to aircraft and no passenger injuries. At the time the aircraft encountered the microburst, the Terminal Doppler Weather Radar (TDWR) Operations Test and Experiment (OT&E) was in progress and detected divergent flow that intersected the operating zones for the approach runways. The radar used to test the TDWR algorithm was the Massachusetts Institute of Technology Lincoln Laboratory 10 cm Doppler radar. The Windshear Case study outlines the technical details of the encounter, as well as describes insights gained from the confrontation that should be applied to future investigations of aircraft encountering windshear. The study summarizes information from several sources including flight crew comments, air traffic control (ATC) operations and surveillance radar data, flight data recorders, data from the TDWR and the Low-Level Wind Shear Alert System (LLWAS), technical details of the event meteorology, and data from the Terminal Area Simulation System (TASS).


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    Title :

    Windshear Case Study: Denver, Colorado, July 11, 1988


    Contributors:

    Publication date :

    1989


    Size :

    550 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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