slf here, im assuming the gpws/at is on the left ralt ?
does this mean this aircraft was doing a dual channel approach for the autopilot to disconnect ? or does that happen with a gpws warning ?
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AO-2009-013: BOEING 737-800 VH-VYL, Sydney Aerodrome NSW, 7 April 2009
While passing 150 ft on short final approach to runway 16R, the co-pilot's radar altimeter indicated 60 ft and the GPWS gave a 10 ft alert. As a result, the autopilot disconnected and the thrust levers moved towards idle. The crew manually increased the thrust. The investigation is continuing.
http://www.atsb.gov.au/publications/investigation_reports/2009/AAIR/aair200901859.aspx