Dual System Failure - Loss of Pressure and Fluid
This is a work in progress
Left Hyd system pressure is less than 1600 PSI with Left Hyd quantity below 0.3 gallons and Right Hyd system pressure is less than 2350 PSI.
- Aircraft Operating Envelope: 285 KCAS / 0.90M maximum.
- Autothrottle: Use of the Autothrottle is prohibited during approach and landing with flaps 10° or less.
- AUX Pump: Inoperative.
- Flaps: Inoperative.
- Flight Controls and Outboard Spoilers: Operative in EB Mode.
- Inboard and Midboard Ground / Flight Spoilers: Inoperative.
- Inboard / Outboard Brakes: Accumulator pressure only.
- Landing: Maximum tailwind component for landing with flaps 10° or less is zero knots.
- Normal Landing Gear Extension: Inoperative.
- Nosewheel Steering: Inoperative.
- PTU: Inoperative
- Thrust Reversers: Inoperative.
- Airspeed . . . 285 KCAS / 0.90M maximum
- Hydraulic Synoptic / Quantity . . . Check (pressure and fluid)
- Airplane . . . Land at nearest suitable airport
- Once the landing airport has been determined:
- PTU . . . NOT ARMED / OFF
- AUX PUMP . . . NOT ARMED / OFF
- Brake Accumulator Pressure . . . Check
- If any brake accumulator pressure is below 2000 psi:
- If all brake accumulator pressures are above 2000 psi:
- If landing with reduced flap settings above 64,350 lb, or with reduced flap settings above 60,000 lb with LFE above 10,000 feet:
- Runway . . . 150 ft wide minimum
- Crosswind . . . Less than 10 knots (if possible) / Touchdown on downwind side
- Approach . . . Plan shallow approach to touchdown in first 1000 feet
- Airspeed . . . Maintain 200 KCAS minimum (until ready to configure for landing)
- If landing with flaps less than 6°:
- AUTOTHROTTLE . . . DISCONNECT
- AT Auto-Engage Inhibit (TSC/Systems/AT Control) Select
- GPWS FLAP INHIBIT INHIBIT . . . Select (Flaps 20° or less)
- NOSEWHEEL STEERING POWER . . . OFF
- Airspeed . . . 175 KCAS maximum
- LANDING GEAR . . . DOWN
- EMER LDG GEAR Handle . . . Pull
- LANDING GEAR Lights . . . 3 green
- Airspeed . . . Establish VREF+ 10 KCAS prior to FAF
- Touchdown Ground Speed . . . 195 knots maximum
- Braking . . . Constant brake pedal displacement
- Directional Control . . . Use Rudder and Differential Braking
- Toe Brakes . . . Maintain
- Wheel Chocks . . . Install
- Landing Gear Safety Pins . . . Install
With the landing gear in the up position the Left Hydraulic System reservoir will show approximately one gallon of fluid with a complete loss of Left Hydraulic System fluid. When the gear is selected down, the Left Hydraulic System reservoir will indicate empty.
IF A HYDRAULIC SYSTEM FAILURE OCCURS WITHIN 2 HOURS AFTER TAKEOFF, LAND AT THE NEAREST SUITABLE AIRPORT NO MORE THAN 4 HOURS AFTER THE FAILURE OCCURRED. CONTINUING FLIGHT IN EXCESS OF 4 HOURS COULD RESULT IN A FLIGHT CONTROL SURFACE FAILURE, AND A LOSS OF AIRCRAFT CONTROL.
Landing distance should be based on VREF +10 KCAS to touchdown.
Wheel fuse plug release may occur due to added landing speed under combinations of high field elevation, landing weight and OAT.
(1) Landing Distance . . . Recalculate with a 1.95 factor
(1) Landing Distance . . . Recalculate with a 1.56 factor
LANDING WITH BRAKE ENERGY EXCEEDING 110.9 MFP MAY RESULT IN BRAKE FAILURE AND FIRE AFTER LANDING. CONSIDERATION SHOULD BE GIVEN TO AN ALTERNATE LANDING LOCATION AND NOTIFICATION OF EMERGENCY RESPONSE CREWS PRIOR TO LANDING.
(1) Refer to 05-11-20, Tire Speed and BKE Limited Maximum Landing Weight.
(1) WAI . . . ON
(2) Wing Temperature . . . Verify above 100°F (above 400 feet AGL)
DO NOT RESET THE EMER LANDING GEAR OR LANDING GEAR DUMP VALVES.
WHEN LANDING WITH PARTIAL FLAPS, MINIMAL FLARE IS REQUIRED. IT MAY BE NECESSARY TO PUSH FORWARD ON THE SIDESTICK TO PUT THE NOSEWHEEL ON THE RUNWAY.
Brake accumulator pressure in flight should be 3000 PSI and therefore antiskid braking will be available through use of the brake pedals. Modulation of the brake pedals should be avoided as that will cause the brake accumulator pressure to deplete more rapidly.
DO NOT ATTEMPT TO TAXI AFTER LANDING. USING BRAKES DURING TAXIING WILL CAUSE RAPID LOSS OF BRAKE ACCUMULATOR PRESSURE AND LOSS OF BRAKING CAPABILITY WILL OCCUR.
THE PARKING BRAKE WILL BE UNAVAILABLE ONCE INBOARD ACCUMULATOR PRESSURE IS LOST.
THE LANDING GEAR SAFETY PINS SHALL BE INSTALLED PRIOR TO RESETTING THE DUMP VALVES.
Gulfstream GVII-G500 Airplane Flight Manual, Revision 1, August 31, 2018