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Old 25th October 2014 | 02:27
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roundsounds
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747-400 Manoeuvre Margin
I think you'll find it's from the crew FMC entries. If an incorrect ZFW or Manual Total fuel entry is made on the PERF INIT page the manoeuvre margin / stick shaker speeds are affected. An incorrect Vref on the APPROACH page will have the same result.
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