PPRuNe Forums - View Single Post - 747-400 RB211 Thrust Control From Thrust Hold (65kts)
Old 25th Feb 2017, 20:03
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NSEU
 
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Thanks!.... I think it's starting to make sense.

My interpretation: The actual OAT/TAT is locked in at HOLD and actual airspeed and altitude is used to compute theoretical changes to TAT. i.e. real world OAT/TAT may vary from the theoretical ideal.
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