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Thread: Derate vs ATM
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Old 19th May 2018, 00:16
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MarkerInbound
 
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Originally Posted by Alex Whittingham
Is the assumed temperature limit assuming that full thrust is applied on the remaining engine for the OEI go case?
The Boeing ATM is based on how the aircraft would perform at a given temperature. Say the aircraft weights 200 tonnes. Looking on a chart we'll say the maximum temperature we can depart from runway XX is 50 degrees. Looking at another chart the engine will produce xx% power at 50 degrees. Therefore weighing 200 tonnes we can set that xx% power and meet all the performance requirements. As PAG said, with the ATM only, the crew can increase the thrust but it is not required to do so to meet the performance standards.
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