Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Training / Qualification; Situational Awareness; Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Flight Crew Took Evasive Action
Human Factors
We were on approach to land at MDT. We had been cleared for the visual approach to RWY 31. The Captain was flying and had the radar page up on his screen due to the weather we had been encountering and I had the terrain page up on my side and we had briefed that the airport was considered mountainous. We were past the FAF on the downwind and the captain elected to spin the altitude knob to 2;200 which was the FAF altitude. We began our descent; as we began to level off I noticed two antennas in the distance and brought it to the Captain's attention. Immediately after having told the Captain we got the 'caution obstacle' aural alert. The Captain immediately turned off the autopilot and made a left base turn away from the obstacles. We landed without any further issues.In retrospect it probably would have been wise to ask for vectors onto the final approach course. We also could have been even more vigilant regarding the terrain page and the obstacles detailed on the approach plate.
Air Carrier First Officer encountered obstacles during descent to Final Approach Fix.