Date: 201309
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Regional Jet 200 ER/LR (CRJ200)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Flight phase: Initial Approach
Airspace: Class D ZZZ
ATC / advisory: Tower ZZZ
Aircraft component: Approach Coupler
Component problem: Improperly Operated
Reporter organization: Air Carrier
Reporter function: Pilot Not Flying; First Officer
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Training / Qualification; Workload; Human-Machine Interface; Distraction; Confusion
Anomaly: Deviation - Altitude Excursion From Assigned Altitude; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Became Reoriented; Flight Crew Executed Go Around / Missed Approach; Flight Crew FLC Overrode Automation
Contributing factors: Aircraft; Human Factors; Weather
Primary problem: Human Factors

Narrative: The weather indicated well above CAT 1 minimums and we were vectored to and shot a normal ILS to minimums. At minimums; we had no visual contact with the airport and executed a normal missed approach. After reviewing the fuel and weather; we opted to attempt another CAT 1 ILS. Just outside the final approach fix Tower informed us that the RVR had fallen below minimums. We advised we were unable to continue the approach and the Controller told us to maintain 3;300 FT and a 090 heading. By this point the autopilot had already captured the glideslope and had started a descent so we were at roughly 2;900 FT when we began executing the missed. The Captain advanced the thrust while I read back the missed approach clearance. When I finished on the radio I asked if he wanted me to clean up the aircraft. He responded that he did and I retracted the flaps. At this point he also asked for autopilot on. In response I engaged the autopilot and then retracted the landing gear but immediately noticed the aircraft had begun an aggressive descent. I called out the descent to the Captain and he disengaged the autopilot and resumed the climb to 3;300. However; during the brief descent; the aircraft had passed gear retraction speed. I called out the speed to the Captain and he retarded the thrust levers. About this time; we received a GEAR DISAGREE message. As the aircraft slowed the message cleared and the gear retracted normally. After reviewing our situation we discovered that the autopilot mode had never changed out of approach mode and had thus attempted to follow the descending glideslope when the autopilot engaged. We further reviewed the weather and decided to divert to a nearby airport where we landed normally and contacted Maintenance about the gear overspeed.The situation began as we discovered the weather was below minimums just a few seconds outside of the FAF. This caused some confusion as the aircraft began a descent just as we decided to execute the missed. Additionally; executing the missed at a spot other than normal caused some confusion. The workload was also very high at this point. Additionally; because there was only a shallow climb involved the aircraft accelerated very quickly when the flaps were retracted. This was made worse by the autopilot initiating a brief descent.This would have been avoided by simply following SOP for a missed approach. This would have ensured that the aircraft and autopilot were configured in a correct and timely manner. The confusion at the FAF and the high workload immediately following led to us getting things out of order and off SOP and resulted in the gear overspeed.




Synopsis: Confusion reigned as the flight crew of an CRJ-200; when advised the weather had deteriorated below minimums; attempted to abandon the approach and the glideslope was captured at the same time as they were leveling at their ATC assigned MAP altitude. A minor altitude deviation and landing gear overspeed resulted.