Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Confusion
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
General Maintenance Action
Human Factors; Aircraft
We were assigned the TAMMY4 RNAV arrival into MEM. After meeting the crossing restriction at TAMMY we got a new assigned altitude down to 6;000. We were a little unclear about the airspeed and were at ROCAB around 20 KTS faster than what is listed on the arrival. To add to our workload we had a GEN2 fail just prior and we had weather on the arrival.
CRJ-200 Captain reports missing the speed restriction crossing ROCAB on the TAMMY4 arrival to MEM due to weather and a generator failure during the descent.