the learning never stops!

Jammed Elevator

G500 Emergency Procedures

This is a work in progress


AFM Procedure

[AFM, §04-13-20]

Possible Cause

An elevator is jammed in a fixed position due to mechanical interference or internal actuator failure.

images

Click photo for a larger image

System Impacts

Jam of an elevator will result in reduced longitudinal (pitch) control effectiveness and degraded lateral-directional (roll-yaw) control effectiveness.

  • Steep Approach: Unavailable.

    Corrective Action

    CAUTION

    IF ELEVATOR JAM OCCURRED DURING TAKEOFF ROTATION, ADJUST PITCH AND THRUST TO REMAIN BELOW 175 KCAS. IF AN ELEVATOR IS JAMMED AT THE TAKEOFF ROTATION DEFLECTION, INSUFFICIENT NOSEDOWN CONTROL MAY BE AVAILABLE ABOVE 175 KCAS.

    NOTE

    To view the FCS Synoptic Legend, refer to 03-13-190, FCS Synoptic Legend.

  1. 1. Autopilot . . . OFF

  2. Elevator Position . . . Assess via FCS Synoptic

  3. If the failed elevator is fixed at a large trailing edge up deflection:

  4. a. Airspeed . . . 175 KCAS maximum

    b. Airplane . . . Land as soon as possible

  5. If the failed elevator is not fixed at a large trailing edge up deflection:

  6. a. Airspeed . . . 285 KCAS / 0.9M maximum

    b. Airplane . . . Land as soon as practicable

  7. PITCH TRIM . . . Use (as required)

  8. ROLL TRIM . . . Neutralize roll control forces

  9. Landing Controllability Check Perform

  10. Refer to 03-13-10, Landing Controlability Check.

    NOTE

    Pitch trim may be used for additional pitch control authority if necessary.

  11. Landing Use shallow approach angle

  12. NOTE

    Landing distance should be based on VREF +10 KCAS to touchdown increased by a 1.25 factor to account for the shallow approach angle.

    Wheel fuse plug release may occur due to added landing speed under combinations of high field elevation, landingweight and OAT.

  13. Landing Distance . . . Recalculate with a 1.25 factor

  14. Airspeed . . . VREF+ 10 KCAS minimum

  15. Flare . . . Minimize

  16. If a go-around is required:

  17. a. Configuration . . . Minimize configuration changes

    b. Airspeed . . . 175 KCAS maximum

References

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

Revision: 2019-04-18
Top