The point here gentlemen and or ladies is that you dont PULL reverse thrust untill all reversers are unlocked.
I didnt mean to have a slanging match with the boffin heads over this one,however.
In my manual it says( and i dont know wether the auto pilot was engaged or not in this case)
QUOTE. UNDER THE ROLLOUT section.:
During rollout ,autothrotttle IDLE mode remains active UNTIL the autothrottle disconnects with the THRUST LEVERS in reverse.
NOTE. Ten seconds after reverse thrust levers are DOWN (it doesnt say all 4)
autothrottle is ARMED until flaps are up. Pushing...A ...(IE ONE) toga switch while the autothrottle is armed activates the autothrottle in THR REF MODE.
Chew on that one
