From the report:
The actuator was virtually
uniform in shape and colour, such that there was no obvious top or bottom to it. The
structural connections could be installed in either orientation and the use of flexible hoses
meant the hydraulic connections could be made to fit an incorrectly installed actuator.
Finally, the hydraulic port on the bottom of the actuator was labelled ‘UP’, with the one on
the top labelled ‘DN’,
Why do we build aircraft parts like this? I thought we banished Murphy from our industry.