APU - Inflight Operation Alternate Electrical Power Source

Gulfstream GVII

Eddie sez:

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

Last revision:

20190418

AFM Procedure

[AFM, §03-03-10]

Corrective Action

  1. MAIN BATTERIES (Left and Right) . . . ON

  2. APU MASTER . . . ON
  3. NOTE

    During APU start the AHRS 1-2 DG Mode (caution) CAS Message may display momentarily.

  4. APU Ready Light. . . Illuminated

  5. APU . . . START

  6. When the APU reaches operating speed (100% RPM):

    1. APU GEN . . . Verify On

    2. Electrical Load . . . Monitor

  7. If APU Generator load exceeds 55%:

    1. Altitude . . . Descend to FL350 or below

  8. If in-flight shutdown of the APU is necessary:

    1. APU . . . STOP

    2. APU MASTER . . . OFF (RPM less than 70%)


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

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