Landlord liable for tenant's accident in the condo complex?

[Herbert Wu]

A week ago, my tenant caused minor damage(bent a bit) to a neighbor's utility line support beam while driving a rented u-haul. My tenant called police/fire and no safety issue found, and also started the process of insurance paying for the damage repairing. 

But this neighbor thinks the insurance process too slow and insists that my tenant or me to give her credit card number  so that she can use her favored contractor to fix the support beam in next 48 hours, otherwise will file lawsuit against landlord. 

I do not think this person is reasonable.  Is landlord responsible for a tenant's accident? I can not figure out how the landlord can be held accountable in this case where no association rules are violated and it is just an accident and my tenant already took responsibility to fix it.