<< >> NASA ASRS Report 406911, May 1998

Pilot of a government operated aerospatiale helicopter AS350B lost all hydraulic pressure during climb out after takeoff resulting in declaring an emergency and return land. During forced running type landing, on the grass in field, the aircraft was not damaged.

Attributes
ACN	406911
Time
Date	199805
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : owd
State Reference	MA
Altitude	msl bound lower : 400 msl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : owd tower : lax
Operator	other
Make Model Name	Helicopter
Flight Phase	climbout : intermediate altitude other
Flight Plan	None
Person 1
Affiliation	government other
Function	flight crew : single pilot flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	406911
Person 2
Affiliation	government other
Function	flight crew : single pilot flight crew : captain
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Upon routine departure at approximately 400-500 ft and 60-70 KTS, experienced hydraulics failure with accompanying warning light and horn. Executed applicable emergency procedure. Isolated hydraulics system. Made appropriate radio calls, declared emergency, summoned fire department. Made run-on landing to grass, to left of runway 10, into wind. Shut down aircraft. No damage to aircraft. Crew coordination was very good. Pilot flying per emergency procedure and training. Copilot monitoring system, making appropriate recommendations, proper radio callouts, etc, until shut down. ATC controller was very efficient and helpful. Initial indication is internal failure of hydraulic pump, ie, no pressure. No lines failed. No servo failures. No loss of fluid, however total loss of hydraulics.

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Original NASA ASRS Text

Title: PLT OF A GOV OPERATED AEROSPATIALE HELI AS350B LOST ALL HYD PRESSURE DURING CLBOUT AFTER TKOF RESULTING IN DECLARING AN EMER AND RETURN LAND. DURING FORCED RUNNING TYPE LNDG, ON THE GRASS IN FIELD, THE ACFT WAS NOT DAMAGED.

Narrative: UPON ROUTINE DEP AT APPROX 400-500 FT AND 60-70 KTS, EXPERIENCED HYDS FAILURE WITH ACCOMPANYING WARNING LIGHT AND HORN. EXECUTED APPLICABLE EMER PROC. ISOLATED HYDS SYS. MADE APPROPRIATE RADIO CALLS, DECLARED EMER, SUMMONED FIRE DEPT. MADE RUN-ON LNDG TO GRASS, TO L OF RWY 10, INTO WIND. SHUT DOWN ACFT. NO DAMAGE TO ACFT. CREW COORD WAS VERY GOOD. PLT FLYING PER EMER PROC AND TRAINING. COPLT MONITORING SYS, MAKING APPROPRIATE RECOMMENDATIONS, PROPER RADIO CALLOUTS, ETC, UNTIL SHUT DOWN. ATC CTLR WAS VERY EFFICIENT AND HELPFUL. INITIAL INDICATION IS INTERNAL FAILURE OF HYD PUMP, IE, NO PRESSURE. NO LINES FAILED. NO SERVO FAILURES. NO LOSS OF FLUID, HOWEVER TOTAL LOSS OF HYDS.

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.