A quick look in my FCOM for the B737 NG series (non FAA/JAA operator) shows we have two versions of CVR:- one version works anytime 115V AC is applied to the aeroplane, and the other version "is activated when an engine is started or the VOICE RECORDER switch is placed in the ON position" it goes on to say that the CVR will change from ON to AUTO after 1st engine start.
Have only known two pilots who "gently" release the B737 park brake and they were/are both Australian
