Ark, if you ever need legal advice over a matter concerning your employer, would you seriously use a firm that is being paid by your employer to possibly prosecute themselves? It's called a conflict of interests.
Company legal protection schemes are only any good if you want legal backing concerning your proffessional standing as a company employee acting on behalf of the company.
I would suggest that the moment you try and turn the companies own legal team on itself, any support would be a bit thin on the ground. Every pilot needs legal cover independant of that provided by their employer.