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Old 27th Jan 2010, 16:19
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lomapaseo
 
Join Date: Mar 2002
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You do whatever runup is required in your FCOM. Each engine type has its own requirements. My 777 manual covers about six engine variants for different models. There are two different procedures listed for before take off and two different procedures for taxi depending on the engine make and model
Could you give some examples of these differences in procedures.

During low-power operations the engines have a tendancy to behave similary relative to ice acretion in the cold section. They also respond similarly to shedding ice, albeit the results may vary. Similarity in procedures between engine models is preferred for consistency in pilot decision making.
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