Narrative:

We were descending to 11000'. At 11500' we experienced total hydraulic failure. We pulled our power to flight idle to reduce our airspeed fr landing gear extension (while we still had some pressure remaining). The extra drag caused us to drop to 10700'. We climbed immediately back to 11000'. (By the way), the gear came down and we landed safely.

Google
 

Original NASA ASRS Text

Title: ALT OVERSHOT IN DESCENT FOR ACR LTT FLT CREW.

Narrative: WE WERE DSNDING TO 11000'. AT 11500' WE EXPERIENCED TOTAL HYD FAILURE. WE PULLED OUR PWR TO FLT IDLE TO REDUCE OUR AIRSPD FR LNDG GEAR EXTENSION (WHILE WE STILL HAD SOME PRESSURE REMAINING). THE EXTRA DRAG CAUSED US TO DROP TO 10700'. WE CLBED IMMEDIATELY BACK TO 11000'. (BY THE WAY), THE GEAR CAME DOWN AND WE LANDED SAFELY.

Data retrieved from NASA's ASRS site as of July 2007 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.