Altitude overshot in descent for air carrier light transport flight crew.

Attributes
ACN	164297
Time
Date	199011
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cng
State Reference	KY
Altitude	msl bound lower : 10700 msl bound upper : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other descent other
Route In Use	enroute airway : zid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4500
ASRS Report	164297
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

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.

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.