The EFB also reduces your take off weight if you opt for flaps 5 which is incorrect according to the performance table in the FPPM, because flaps 5 has a higher climb limit than flaps 15 and flaps 20 at 15 degrees Celsius. This is despite 656,000 lbs being a take off weight option in the FMC and those engines are all certified in real life for take offs at 656,000 lbs. The EFB cannot calculate a take off weight higher than 645,000 lbs for the RR Trent892 and 650,000 lbs for the GE94B under standard conditions, with a runway thats 12,000 feet long, and elevation at 28 feet.
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