Totally different aircraft type, but I was involved in an incident with an ATR42 years ago.
Aircraft had generator failure inbound. No real issue.
Normal procedure was to shut down No.1 on taxiing in. Nothing in the QRH (at the time) to prevent this from still occurring after a gen failure.
Brake check carried out before entering stand (using up residual accumulator pressure) and aircraft failed to stop on stand.....right hand prop sliced through waiting ground power unit, left hand engine hit jetty.
Similar issues to this, and again by the time crew realised what was happening, reaching for the Emergency (parking) brake was too late.