Date: 201701
Local time of day: 0601-1200
Location: ZZZ.TRACON, US
Aircraft: EMB ERJ 170/175 ER/LR
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Initial Approach
Airspace: Class B ZZZ
ATC / advisory: TRACON ZZZ
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Confusion; Workload; Situational Awareness
Second reporter function: Captain; Pilot Not Flying
Anomaly: Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Regained Aircraft Control
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: On [a] flight to ZZZ we had the stick shaker go off in the aircraft because we got too slow; while intercepting the ILS. It was my leg and the aircraft was on autopilot at about 5000ft. The Captain and I were involved. We were getting vectored for the ILS and finally got cleared to intercept the course on a heading so I armed the Nav to intercept it. During this time; I started to slow the aircraft down from 230kts which was our last assigned speed. I put the speed brakes out and was waiting to start configuring at the right speeds. It seemed to me that we were given a heading inbound a little late which would end up taking us through the course. Right before the aircraft going through the course; we got cleared for the approach so I armed the APP. At this time it took the aircraft some time to intercept the course while switching from NAV to the APP mode; while flying through the course at the same time so I pressed the Touch Control Steering (TCS) button to bank a little more and help it intercept the inbound course. When I started to bank; I realized that we needed to start dropping the flaps because we were getting slow and I left the speed brakes out so when I was about to call for the flaps; I got the aural message 'Bank Angle'; I had banked through the 45 degree mark. Almost instantly we got the stick shaker and the captain took the controls and recovered right away. We continued the approach and landed.Configuring early would have prevented this whole situation. But I waited too long to slow down and lower the flaps; and when the aircraft was slow enough for us to lower the flaps; we were dealing with intercepting the course inbound on the ILS and got too slow.


Second narrative: First Officer was flying. Flew a normal downwind and was assigned a 230 heading; then was giving a turn to 335 to join the localizer and a decent to 4000. The vector was too tight and put us through the localizer. First Officer pushed the Touch Control Steering (TCS) button and banked the plane to mitigate how far we flew through the localizer. He became disoriented; over banked; then abruptly pulled back on the controls G loading the aircraft and inducing the shaker. I took the aircraft; retracted the speed brakes; rolled the wings level; over rode the auto throttles to add power and reestablished the aircraft at 4000 feet on the localizer. At this point I reengaged the auto pilot. I had a conversation with First Officer and determined [he] was mentally fit to continue the approach. The approach terminated normally.


Synopsis: A regional jet flight crew reported an unstable flight condition while performing an instrument approach. Aircraft limits were exceeded and a deterioration of airspeed resulted in generating a stick shaker warning.