From new member lazyonics: https://rotate.aero/forum/747400-32/761-autobrake-issue  

Aft cargo door not opening. Numerous shifts were messing with it. It took two days to figure out the

One way of checking for intermittent opens in signal or power wires is to use a load light at t

       https://rotate.aero/forum/767-36pnuematics/751-prv-exit-pressure-sensor

  https://rotate.aero/forum/767-28fuel/752-apu-dc-fuel-pump#1863