A319 aborts takeoff at low speed due to ECAM green hydraulic system failure.

Attributes
ACN	724496
Time
Date	200701
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mke.airport
State Reference	WI
Altitude	agl single value : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 275 flight time total : 16300 flight time type : 5000
ASRS Report	724849
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 7400
ASRS Report	724735
Events
Anomaly	aircraft equipment problem : critical excursion : runway
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : unable other
Supplementary
Problem Areas	Weather Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

After setting power for the takeoff; we received an engine #1 green hydraulic system low pump pressure ECAM. I observed the hydraulic ECAM page displayed and the engine driven pump low pressure indication. We xferred control and aborted at between 60-70 KTS. Taxied clear of the runway and turned left on taxiway C. Performed the ECAM procedure and contacted maintenance control. Maintenance control had us go through some troubleshooting steps and it was determined that this was a bad low pressure sensor; but that the pump was producing normal hydraulic pressure. The indication was deferred; we followed the steps outlined on the MEL placard and requested taxi clearance to runway 25R. While taxiing on taxiway C; we lost green hydraulic system quantity. Informed tower we would be re-requesting a tow back to the terminal and that they should inspect the taxiway. Once at the gate; and after the passenger had deplaned; station maintenance informed us that the pump pressure sensor had broken off of the housing and caused the leak.

Original NASA ASRS Text

Title: A319 ABORTS TKOF AT LOW SPEED DUE TO ECAM GREEN HYDRAULIC SYSTEM FAILURE.

Narrative: AFTER SETTING PWR FOR THE TKOF; WE RECEIVED AN ENG #1 GREEN HYD SYS LOW PUMP PRESSURE ECAM. I OBSERVED THE HYD ECAM PAGE DISPLAYED AND THE ENG DRIVEN PUMP LOW PRESSURE INDICATION. WE XFERRED CTL AND ABORTED AT BTWN 60-70 KTS. TAXIED CLR OF THE RWY AND TURNED L ON TXWY C. PERFORMED THE ECAM PROC AND CONTACTED MAINT CTL. MAINT CTL HAD US GO THROUGH SOME TROUBLESHOOTING STEPS AND IT WAS DETERMINED THAT THIS WAS A BAD LOW PRESSURE SENSOR; BUT THAT THE PUMP WAS PRODUCING NORMAL HYD PRESSURE. THE INDICATION WAS DEFERRED; WE FOLLOWED THE STEPS OUTLINED ON THE MEL PLACARD AND REQUESTED TAXI CLRNC TO RWY 25R. WHILE TAXIING ON TXWY C; WE LOST GREEN HYD SYS QUANTITY. INFORMED TWR WE WOULD BE RE-REQUESTING A TOW BACK TO THE TERMINAL AND THAT THEY SHOULD INSPECT THE TXWY. ONCE AT THE GATE; AND AFTER THE PAX HAD DEPLANED; STATION MAINT INFORMED US THAT THE PUMP PRESSURE SENSOR HAD BROKEN OFF OF THE HOUSING AND CAUSED THE LEAK.

Data retrieved from NASA's ASRS site as of January 2009 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.