"This lesson (spooled-up) is still in contention with one very large operator that refuses to acknowledge nor comply with the FAA's and FSF "energy management element" of the STABILIZED APPROACH concept [they assert their own alternative standard ("at stabilized thrust") which is rejected by our industry]."
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What do they use? Didn't some regulatory oversight agree with their procedures?
There was a learning curve going from straight wing propellor driven a/c to swept wing jet a/c. High altitude aerodynamics, high speed aerodynamics, high sink rate, slow spool issues, balanced field issues, etc, etc.