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Old 31st May 2010, 11:41
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Zeffy
 
Join Date: Feb 2006
Location: USA
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Whatsit Doingnow

"Config was F15 gear down on downwind, then abeam threshold start timing and select F25 then F40, turn base after 25 seconds using bank angle 30°..."

It's hard to imagine that method working in a TERPS environment in situations where obstacles are lurking immediately beyond the containment areas.

Was the company using Cat C or Cat D minima?

What airspeeds were typical for those configurations?

Recall the B767 CFIT at Busan and note the elapsed time from abeam the threshold to the turn for the right base leg:

...At 11:20:02,the captain said, “Timing” to measure for the commencement of turning base. At this time, according to the aircraft track calculated from the FDR data, the aircraft was positioned about abeam the threshold of runway 18R, with an airspeed of 157 kt, ground speed 177 kt and heading 011 degrees...

At 11:20:32, the captain said,“Flaps 30, already extended,”and then the captain disconnected the autopilot, and manually started to bank right.
Timing may well be appropriate for PANS-OPS maneuvering, but I can't imagine that it works consistently in the TERPS world, especially with significant winds.
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