Air carrier first officer encountered obstacles during descent to final approach fix.

Attributes
ACN	1640962
Time
Date	201904
Local Time Of Day	1801-2400
Place
Locale Reference	MDT.Airport
State Reference	PA
Aircraft 1
Make Model Name	Medium Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT Inflight Event / Encounter Weather / Turbulence

Narrative:

We were on approach to land at mdt. We had been cleared for the visual approach to runway 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.

Original NASA ASRS Text

Title: Air Carrier First Officer encountered obstacles during descent to Final Approach Fix.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.