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Left System Failure - Loss of Pressure and Fluid

G500 Emergency Procedures

This is a work in progress


AFM Procedure

[AFM, §04-15-20]

Possible Cause

The left HYD pressure is less than 1600 PSI or greater than 3449 PSI and the left HYD quantity is less than 0.3 gal.

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System Impacts

  • 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.

  • Inboard Brakes: Accumulator pressure only.

  • Normal Landing Gear Extension: Inoperative.

  • NWS: Inoperative.

  • Landing: Maximum tailwind component for landing with flaps 10° or less is zero knots.

  • Midboard Spoilers: Inoperative.

  • PTU: Inoperative.

  • L T/R: Inoperative.

Corrective Action

  1. Airspeed . . . 285 KCAS / 0.90M maximum

  2. NOTE

    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.

  3. Hydraulic Synoptic / Quantity . . . Display / Check

  4. If hydraulic failure occurred within 2 hours of takeoff:

  5. WARNING

    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.

    1. Airplane . . . Land at nearest suitable airport no more than 4 hours after the hydraulic failure

    2. Go to Step 5.

  6. If hydraulic failure did not occur within 2 hours of takeoff:

  7. NOTE

    Hydraulic fluid temperature has stabilized, and flight control surface failure is not a concern.

    1. Airplane . . . Land as soon as practicable

  8. Once the landing airport has been determined:

    1. PTU . . . NOT ARMED / OFF

    2. AUX PUMP . . . NOT ARMED / OFF

    3. Brake Accumulator . . . Pressure Check

    4. If left brake accumulator pressure is below 2000 psi:

    5. (1) Landing Distance . . . Recalculate with a 1.56 factor

    6. If left brake accumulator pressure is normal:

    7. (1) Landing Distance . . . Recalculate with a 1.25 factor

      NOTE

      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.

    8. Landing Distance . . . Recalculate

    9. 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:

    10. CAUTION

      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.

    11. Runway . . . 150 ft wide minimum

    12. Approach Winds . . . Plan an approach and runway that maximizes headwinds during approach and landing

    13. Crosswind . . . Less than 10 knots (if possible) / Touchdown on downwind side

    14. Approach . . . Plan shallow approach

    15. Airspeed . . . Maintain 200 KCAS minimum (until ready to configure for landing)

  9. Approach

    1. If landing with flaps less than 6°:

    2. (1) WAI . . . ON

      (2) Wing Temperature . . . Verify above 100°F (above 400 feet AGL)

    3. AUTOTHROTTLE . . . DISCONNECT (Flaps 10° or less)

    4. GPWS FLAP INHIBIT . . . Select (Flaps less than 20°)

    5. NOSEWHEEL STEERING POWER . . . OFF

    6. Airspeed . . . 175 KCAS maximum

    7. LANDING GEAR . . . DOWN

    8. EMER LDG GEAR Handle . . . Pull

    9. LANDING GEAR Lights . . . 3 green

    10. CAUTION

      DO NOT RESET THE EMER LDG GEAR HANDLE OR LANDING GEAR DUMP VALVES PRIOR TO LANDING.

    11. Airspeed . . . Establish VREF+ 10 KCAS prior to FAF

    12. CAUTION

      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.

    13. Touchdown Ground Speed . . . 195 knots maximum

  10. If landing with flaps less than 10°:

    1. Touchdown Groundspeed . . . 195 knots maximum

  11. Landing

    1. Thrust Reverser (Right) . . . Deploy / As required

    2. Rudder and Differential Braking . . . As required to maintain directional control

    3. CAUTION

      THE PARKING BRAKE WILL BE UNAVAILABLE WITHOUT LEFT HYDRAULIC PRESSURE, OR ONCE INBOARD ACCUMULATOR PRESSURE IS LOST.

      NOTE

      The inboard brake accumulator pressure will not be replenished. When the inboard brake accumulator pressure is depleted, continued operation and braking will be performed only with the outboard brakes.

    4. Toe Brakes . . . Maintain

    5. Wheel Chocks . . . Install

    6. CAUTION

      THE LANDING GEAR SAFETY PINS SHALL BE INSTALLED PRIOR TO RESETTING THE DUMP VALVES.

    7. LANDING GEAR Safety Pins . . . Install

References

Gulfstream GVII-G500 Airplane Flight Manual, Revision 1, August 31, 2018

Revision: 2019-04-30
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