Emergency AC Bus Fault and AC/DC Reset

Gulfstream GVII

Eddie sez:

There isn't much here other than the AFM procedure. I'll give this more thought when I get a chance.

Everything here is from the references shown below, with a few comments in an alternate color.

Last revision:

20191019

AFM Procedure

[AFM, §03-04-40]

images

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Corrective Action

  1. 1. AC Power Synoptic Page . . . Check
  2. DC Power Synoptic Page . . . Check
  3. NOTE

    The AC / DC RESET switch should not be pressed more than one time.

  4. AC / DC RESET Switch . . . PRESS and RELEASE
  5. If the Emergency AC Bus is powered:
    1. Go to Step 6.
  6. If the Emergency AC BUS is not powered:
    1. Go to Step 8.
  7. If the L ESS DC Bus is on battery power:
    1. Go to Step 8.
  8. If the L ESS DC Bus is not on battery power:
    1. The procedure is complete.
  9. Slip Skid Indicator . . . Centered
  10. RAT . . . Deploy
  11. NOTE

    The RAT will power the Emergency AC, L ESS DC and R ESS DC busses.

  12. RAT GEN . . . Verify On
  13. Airplane . . . Land as soon as practicable
  14. EMERGENCY POWER . . . ARM
  15. Final Approach
  16. NOTE

    RAT GEN will drop off line below approximately 200 KCAS. To prevent the RAT GEN from repeatedly shedding the load and then resupplying electrical power, the RAT GEN must be selected OFF prior to decelerating to less than 200 KCAS.

    1. FLAPS . . . 20°
    2. RAT GEN . . . Off (above 200 KCAS)
    3. LANDING GEAR . . . DOWN
    4. FLAPS . . . 39°
    5. If a go-around is necessary:
    6. (1) Once at greater than 200 KCAS:

      (a) RAT GEN . . . ON


Gulfstream GVII-G500 Airplane Flight Manual, Revision 4, August 29, 2019

Gulfstream GVII-G500 Production Aircraft Systems, Revision 3, July 15, 2019