Originally Posted by notEnuf

The extension was never supposed to be a part of the regulation. The study recommended duty be limited to a time based on their research. The airline lobby said we can't run the business that way because we have to many variables. What if ...weather ...mechanical etc. The industry stuck on an extension and sold it as an option, we will ask the pilots if they're ok. Your workday extended is a higher risk environment which researchers identified as dangerous. The findings were that the human performance diminishes without any identifiable self awareness. So limits were set to prevent continued operation into the riskier time periods where performance dramatically declines.

This extension was never intended to be automatic or even possible. Then ALPA lobby whiffed on this and sided with the industry after it was outgunned and needed to be on the winning side.