Presumably the unit was found in a similar condition this audit as well?
Hence moving the NC to 1.1.12: The site's senior management shall ensure that the root causes of any non-conformities against the Standard identified at the previous audit have been effectively addressed to prevent recurrence.
If this is a near-exact repeat of the previous NC then it would be very difficult to argue that the original preventative action worked. You may need to provide more detail on this - for example, was the the electric box added to your routine inspection schedule, preventative maintenance schedule, and/or cleaning schedule (as applicable)?
If not, then it looks like it very much should be.
If it was, then presumably these haven't been followed correctly, in which case there is an argument that further training and supervision is needed for the maintenance operators and perhaps also for their supervisors/manager (whoever has oversight of this team and should be checking/reporting these actions as closed / chasing them up).
Given that your NC this time has fallen into the Senior Management Commitment section, I very much suspect that elements of your corrective and preventative actions will need to sit in this area. Is performance on maintenance / routine fabrication, hygiene and internal audits / audit non-conformances included in your senior management review process?
If yes, then you may want to consider revising how this is done, as it missed this.
If no, then definitely look to include it.
Given that this got missed internally ahead of the audit despite being a previous NC, I'd also look at how much time senior managers spend (or don't spend) on the factory floor - for example you could schedule the site's most senior quality/food safety manager to perform one in two/three/four (probably a higher frequency to start with) of your routine hygiene/fabrication audits so they're demonstrably closer to what is happening in production. Potentially they should be accompanied by whoever is in charge of facilities/operations - obviously the facilities/ops person can't audit themselves, but it would afford an opportunity for them to see where their team need to make improvements, as this information doesn't seem to be being communicated upwards correctly at present.
Internally you possibly also want to look at how information is - or possibly isn't - being fed upwards from the staff on the floor to senior management. This might not directly form part of your corrective/preventative actions (given that the NC is against a Senior Management clause), but the finding does potentially imply that there could be improvement here.
