What was found
SMOKE CAME FROM LT 2ND SPEAKER IN PASSENGER COMPARTMENT. VERY THICK SMOKE, VERY PROFOUND ELECTRICAL BURNING SMELL. MX FOUND SEATS 1, 2, 3A, AND SEATS 6, 7, 8A BALLAST FOR OVERHEAD LIGHTS INOP. MX REMOVED AND REPLACED BOTH ALLASTS PN6511-1. OP CHECKS GOOD REMOVED FROM DMR/MXC NOTIFIED.