Why is 2000 fpm initial rate of climb on auto GA
B737. On an auto go-around, pressing TOGA normally gives you a lower N1 than normal GA thrust since initial rate of climb is set at 2000 fpm.
However, on a manual throttle go-around it is normal to push the thrust levers to full GA thrust since the exact N1 to maintain an initial rate of climb of 2000fpm is not tabulated anywhere.
If it is considered "safe" to apply normal GA thrust in a manual GA, then why on an automatic GA with AT engaged, does Boeing used reduced power to maintain 2000 fpm rate of climb when full GA thrust is happily accepted for a manual GA?
After all, during a manual GA the PF opens up the thrust levers and says "Set GA thrust". And the PF does just that. He doesn't fiddle the books (thrust levers) to set 2000 fpm rate of climb.