"THR HLD" and Clamp
Hi all.
I'm teaching an ATPL class in instrumentations and I'm trying to find out what actually happens with the thrust levers and autothrottle actuator during take off when the FMA says THR HLD (737) or CLAMP (Md80). I know that it is a mode to prevent undesired thrust adjustments by possibly faulty autothrottle signals, but how is this achieved in regards to the mechanical inner workings of the thrust lever and autothrottle assembly? Unfortunately I've only flown aircraft without autothrottle so my knowledge in this area is limited so trying to make up for it by asking around...
/LnS