What was found
On Flt#20, TPA to JFK, Passenger noticed sparks coming from a wire on the floor at seat row #8A/C left. Turned live TV'S OFF, did not stop sparking, pulled LTV CB's and sparking stopped.T/S found seat to seat cable for seat 8ABC to 7ABC pinched by passenger foot to seat frame causing short and sparks. Placed entire LTV on MEL 25-22-03, CB'S collared till cable is replaced. OK to continue. Removed and replaced seat to seat cable 7ABC to 8ABC IAW MM 23-37-00, system CK OK. Placard removed.