MD88 flight crew declared an emergency after the left hydraulic system failed due to losing hydraulic fluid during high altitude cruise.

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Attributes
ACN	558780
Time
Date	200209
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : mci.vortac
State Reference	MO
Altitude	msl single value : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : private pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 13000 flight time type : 2500
ASRS Report	558780
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : l hyd system quantity ind other flight crewa other flight crewb
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Had decreasing quantity of left hydraulic system. Performed pom procedures. On left system, power up for landing confign (basically, turn system back on). Left pressure remained at zero. Declared emergency and landed with no problems. No assistance necessary.

Original NASA ASRS Text

Title: MD88 FLC DECLARED AN EMER AFTER THE L HYD SYS FAILED DUE TO LOSING HYD FLUID DURING HIGH ALT CRUISE.

Narrative: HAD DECREASING QUANTITY OF L HYD SYS. PERFORMED POM PROCS. ON L SYS, PWR UP FOR LNDG CONFIGN (BASICALLY, TURN SYS BACK ON). L PRESSURE REMAINED AT ZERO. DECLARED EMER AND LANDED WITH NO PROBS. NO ASSISTANCE NECESSARY.

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.