Tricky one is this.
1. Whoever signed for the refitting of the hoses, must have been convinced that the hoses had been refitted, either because someone else was tasked with fitting them and didn't or he/she was doing the job them selves and for some reason convinced themselves that they had done it. That is a maintenance error and in a busy maintenance environment it can and does happen (there for the grace of god etc). A just culture would investigate and determine why the inspector did not inspect. Was a duplicate inspection required?
2. The leak test post fitment. Was that a requirement? If they are quick release fittings is an external pressure test required? If it is and someone signed it off without performing the test then that is another story.
I would like more info on this before passing judgement. Procedures are there for a reason, we are not paid enough to take chances, well i'm not anyway.