A crj-700 captain reported loss of #2 hydraulic system. QRH procedures were followed; dispatch conta...

Narrative:

During the cruise portion of flight my first officer and I heard a pop; followed by rumbling noises. The flight attendant's called the flight deck to report the noise as well. We then got a hydraulic 2 lo press cass message with corresponding/associated spoiler messages. Hydraulic quantity was at that time 45 percent and rapidly falling. By the time the QRH was referenced the hydraulic quantity in system 2 had dropped to 5 percent. We followed the QRH procedures; declared an emergency; notified dispatch; and landed at the nearest suitable airport. I chose ZZZ due to its close proximity and long runways.

Original NASA ASRS Text

Title: A CRJ-700 Captain reported loss of #2 hydraulic system. QRH procedures were followed; Dispatch contacted; an emergency declared; and a divert to the nearest suitable airport was executed.

Narrative: During the cruise portion of flight my First Officer and I heard a pop; followed by rumbling noises. The Flight Attendant's called the flight deck to report the noise as well. We then got a HYD 2 LO PRESS CASS message with corresponding/associated spoiler messages. Hydraulic quantity was at that time 45 percent and rapidly falling. By the time the QRH was referenced the hydraulic quantity in system 2 had dropped to 5 percent. We followed the QRH procedures; declared an emergency; notified Dispatch; and landed at the nearest suitable airport. I chose ZZZ due to its close proximity and long runways.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	874395
Time
Date	201002
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

A crj-700 captain reported loss of #2 hydraulic system. QRH procedures were followed; dispatch contacted; an emergency declared; and a divert to the nearest suitable airport was executed.