Porter Airlines flight PD2375, a DHC-8-402Q, suffered a tailstrike during touchdown on runway 27 at Fredericton Airport, NB (YFC). While at cruise altitude, the Pilot Flying (the captain) briefed the area navigation global navigation satellite system (RNAV [GNSS]) Z approach to Runway 27. Based on the landing weight and the flaps set at 15ø, the planned target landing reference speed (VREF) was 124 knots indicated airspeed (KIAS), and the flight crew added a 10-knot buffer, increasing the planned approach speed to 134 KIAS. At 1356, the flight was cleared to land, and the control tower reported the winds to be from 350ø magnetic at 11 knots. At 13:59:30, when the aircraft was 267 feet above touchdown zone elevation (TDZE), the PF disconnected the autopilot and began to fly the approach manually. When the aircraft was 135 feet above the TDZE, the aircraft was travelling at 126 KIAS, the descent rate was 700 fpm, and the pitch was 3.2ø. When the aircraft was 20 feet above the TDZE, it was travelling at 124 KIAS, the descent rate had increased to 980 fpm, and the pitch was 1.1ø. The headwind component decreased from 5.5 knots to 0.5 knots within 3 seconds, increasing the maximum descent rate to 1050 fpm. In response, over a period of 2 seconds, the PF increased the pitch from 1.1ø to 6.8ø. The power was consistently at 14% torque. At 13:59:53, the right main landing gear contacted the runway, followed by the left main landing gear. A vertical acceleration of 3.51 g was recorded. After the initial contact with the runway, the aircraft bounced, and the flight crew initiated a go-around in accordance with Porter Airlines? standard operating procedures (SOPs). Two seconds later, a second runway contact occurred with a recorded vertical acceleration of 1.42 g. After the first touchdown, the TOUCHED RUNWAY warning light illuminated, indicating that a sensor near the tail section of the aircraft had been triggered by contact with the runway surface. In addition, the master warning light started flashing. During the climbout, the flight crew noticed the master warning and TOUCHED RUNWAY warning lights; however, they did not discuss the issue further at that time. The flight crew were cleared by the tower controller to conduct a visual flight rules circuit and return to land. The aircraft landed uneventfully at 1408, and the flight crew taxied the aircraft to the apron and shut it down. Damage to the lower portion of the aft fuselage section was identified and company flight operations personnel were notified.