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Flap Asymmetry

G500 Abnormal Procedures

This is a work in progress


AFM Procedure

[AFM, §3B-06-120]

Possible Cause

  • Flap position asymmetry detected between position sensors.

Flap Asymmetry (caution)

System Impacts

  • Flap Movement: Unavailable.

  • Landing Distance: Increased.

Corrective Action

    CAUTION

    DO NOT ATTEMPT FURTHER MOVEMENT OF FLAPS.

  1. Airspeed . . . Reduce

  2. ROLL TRIM . . . Neutralize roll forces

  3. If unable to neutralize roll trim:

    1. Airspeed . . . Reduce towards VREF

  4. If flap asymmetry occurs with flap position greater than 20°:

    1. Airplane . . . Land within approximately 30 minutes

    2. According to the engineer who wrote this, the threat is that the airloads on the flaps can push them in (retract) which could exacerbate roll tendencies.

  5. Refer to 03-12-10: Zero Flaps or Partial Flaps Landings.

References

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

Revision: 20190614
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