Section 8 not paying. Unable to evict?

[Stone Teran]

I know a landlord who has a tenant with section 8. The tenant started a repair complaint which triggered an inspection, which triggered multiple repair items and eventually section 8 stopped paying. This landlord filed an eviction for non-payment of rent. The tenant's attorney is saying that the section 8 HUD contract that the landlord signed stipulates the tenant is responsible for only the $50/month tenant portion and this contract trumps the original lease contract. Could the tenant attorney be correct in that the landlord has to accept $50/month until the housing authority decides to terminate the HUD contract?