A flight experiences turbulence followed by a loss of a hydraulic system.

Attributes
ACN	590906
Time
Date	200308
Day	Fri
Local Time Of Day	1201 To 1800
Place
State Reference	OH
Altitude	msl bound lower : 34500 msl bound upper : 35000
Environment
Flight Conditions	IMC
Weather Elements	Turbulence Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 10100 flight time type : 4100
ASRS Report	590906
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe inflight encounter : turbulence inflight encounter : weather
Resolutory Action	flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft Weather
Primary Problem	Aircraft

Narrative:

While deviating around WX, in IMC conditions, we encountered moderate turbulence. The aircraft descended 500 ft, PF disconnected the autoplt and climbed back to FL350. No injuries were reported from the cabin. At the same time we encountered the turbulence we lost the yellow hydraulic system due to low level in system. Declared an emergency after consulting with maintenance control and proceeded to destination. Landing and taxi-in was uneventful. However, during postflt inspection discovered hydraulic fluid leaking from left wing flap track canoe fitting.

Original NASA ASRS Text

Title: A FLT EXPERIENCES TURB FOLLOWED BY A LOSS OF A HYD SYS.

Narrative: WHILE DEVIATING AROUND WX, IN IMC CONDITIONS, WE ENCOUNTERED MODERATE TURB. THE ACFT DSNDED 500 FT, PF DISCONNECTED THE AUTOPLT AND CLBED BACK TO FL350. NO INJURIES WERE RPTED FROM THE CABIN. AT THE SAME TIME WE ENCOUNTERED THE TURB WE LOST THE YELLOW HYD SYS DUE TO LOW LEVEL IN SYS. DECLARED AN EMER AFTER CONSULTING WITH MAINT CTL AND PROCEEDED TO DEST. LNDG AND TAXI-IN WAS UNEVENTFUL. HOWEVER, DURING POSTFLT INSPECTION DISCOVERED HYD FLUID LEAKING FROM L WING FLAP TRACK CANOE FITTING.

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.