Speedbrake on the B757
In the event of the auto-speedbrake being inoperative, our company procedures call for manual deployment of the speedbrake on touchdown only after the nose has started to lower.
Why should this be, given that, when the auto-speedbrake is functioning, it will deploy as soon as the main wheels touch the ground, irrespective of the attitude of the nose.
Also, should I be deploying the reversers before or after I select the speedbrake? Sounds very anal, I know, but neither the Captain or I knew the correct answer on a recent trip.