As a career ANA captain, Tsukamoto had flown the Seattle-Tokyo leg many times in different aircraft. He knows by memory that a 747-400 needs at least 136,000kg (300,000lb) to make that trip. The smaller, leaner 777-300ER needs nearly 100,000kg. For the 787-8, the fuel gauge that drizzly September day in Seattle read 63,500kg for the Pacific crossing.
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