HS125 first officer reports the loss of both hydraulic systems in rapid succession upon leveling off...

Attributes
ACN	935878
Time
Date	201103
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	HS 125 Series
Operating Under FAR Part	Part 135
Flight Phase	Initial Climb
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 106 Flight Crew Total 4109 Flight Crew Type 2214
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Upon reaching FL390 the hydraulic ovht light illuminated on the msw. A few minutes later; the hydraulic 2 lo press light illuminated followed by the hydraulic 1 lo press light. A 180 degree turn was coordinated with center and a request for direct to nearest suitable airport was initiated; followed by an emergency declaration. After completing the manufacturer's checklist for dual hydraulic lo press; it was decided that the aircraft could continue flying to an airport where suitable runway; emergency vehicles; and maintenance facilities were located. Use of the auxilary hydraulic system was required and the gear and flaps were 'pumped' down. The aircraft landed without incident using normal braking and then came to a stop on the runway. Upon inspection; hydraulic fluid was dripping from under the #1 engine.

Original NASA ASRS Text

Title: HS125 First Officer reports the loss of both hydraulic systems in rapid succession upon leveling off at FL390. Flight diverts to an airport with maintenance capabilities and a normal landing ensues after the gear and flaps are pumped down.

Narrative: Upon reaching FL390 the HYD OVHT light illuminated on the MSW. A few minutes later; the HYD 2 LO PRESS light illuminated followed by the HYD 1 LO PRESS light. A 180 degree turn was coordinated with Center and a request for direct to nearest suitable airport was initiated; followed by an emergency declaration. After completing the manufacturer's checklist for dual hydraulic lo press; it was decided that the aircraft could continue flying to an airport where suitable runway; emergency vehicles; and maintenance facilities were located. Use of the Auxilary Hydraulic system was required and the gear and flaps were 'pumped' down. The aircraft landed without incident using normal braking and then came to a stop on the runway. Upon inspection; hydraulic fluid was dripping from under the #1 engine.

Data retrieved from NASA's ASRS site as of April 2012 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.

HS125 first officer reports the loss of both hydraulic systems in rapid succession upon leveling off at FL390. Flight diverts to an airport with maintenance capabilities and a normal landing ensues after the gear and flaps are pumped down.