EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Training / Qualification; Troubleshooting
Aircraft Equipment Problem Critical
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; General Declared Emergency; General Maintenance Action
Aircraft
Enroute we lost Hydraulic System 2 fluid followed by a Hydraulic 2 Low Quantity message on the EICAS.  We monitored the hydraulic quantity as it decreased to the minimum indicated value and simultaneously reviewed the QRH procedures for low quantity and possible hydraulic system failure.  We notified both Dispatch and Maintenance Control via ACARS of our situation.  Ultimately we lost the engine 2 driven hydraulic pump and then experienced System 2 hydraulic failure.  An emergency was declared with Center and we requested that Airfield Rescue and Fire Fighters (ARFF) meet us at our filed destination.  Dispatch was notified as well as destination Operations.  We were about 30 minutes out when I (Captain) briefed the Flight Attendant on our situation.  I also made a PA to inform the passengers about our situation.  I was the flying pilot and ultimately flew a normal approach and landing.  The First Officer did an excellent job in communicating with ATC; Company; as well as monitoring me and running the checklists. We were met by ARFF vehicles as requested.  After parking and securing the aircraft a significant hydraulic leak was observed coming from the belly of the aircraft.Loss of partial power to ailerons; rudder; loss of inboard brakes; loss of outboard spoilers; and loss of No. 2 thrust reverser.  Uneventful approach and landing.  Reduced breaking effectiveness and warm brakes after landing and taxi in.
Situation itself due to the Hydraulic System 2 failure was a threat and a distraction that increased our workload. Having only 1 reverser; less power to the ailerons; not able to use speedbrakes; and the brakes on landing were threats. Brakes on landing were quite sluggish and were heating up fast. Always monitor all systems; which is exactly what the Captain and I were doing. Any system failure can happen at any time; and I think we worked well together and made the best decisions we could to ensure a safe outcome.
An EMB-145 EICAS alerted HYD 2 LOW QTY followed by ENG 2 PUMP FAIL while at cruise so an emergency was declared and the flight continued to the filed destination for an uneventful emergency landing.