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ACS — Pack Fail - Dual

G500 Abnormal Procedures

This is a work in progress


AFM Procedure

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Photo: Pack fail indications, PAS, p. 1-20

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[AFM, §03-01-20]

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System Impacts

  • Dual Pack Failure: Cabin altitude will climb with both packs failed and should reach 8000 feet in approximately 3 minutes at normal cruise altitudes.

Corrective Action

  1. Altitude . . . Coordinate immediate descent

  2. CAUTION

    CABIN ALTITUDE WILL CLIMB WITH BOTH PACKS SECURED. DO NOT DELAY DESCENT.

  3. Pressurization . . . Verify cabin climb rate

  4. ECS Packs (Left and Right) . . . OFF

  5. Affected ECS Pack Control / Auto Temp SSPCs . . . PULL and RESET
  6. Right Pack
    PACK CTRLR R: SSPC 3609
    PACK OFF R: SSPC 2122
    PACK ON R: SSPC 2124
    Left Pack
    PACK CTRLR L: SSPC 3608
    PACK OFF L: SSPC 2121
    PACK ON L: SSPC 2123
    AUTO TEMP CTL AFT: SSPC 2106
    AUTO TEMP CTL FWD: SSPC 2107

  7. ECS Packs (Left and Right) . . . ON (one at a time)

  8. If one pack remains inoperative:

    1. Refer to 03-01-10, Pack Failure - Single.

  9. If both packs are inoperative:

    1. ECS Packs (Left and Right). . . OFF

    2. RAM AIR (OHPTS / ECS) . . . Select

    3. CPC FAULT / MANUAL Switch . . . MANUAL

    4. NOTE

      Continued flight with the TROV full open prevents cabin overheat conditions.

    5. CABIN ALT Knob . . . Climb (Full Open)

    6. Altitude . . . Descend to 10,000 feet or minimum enroute altitude (if higher)

    7. Airplane . . . Land as soon as practicable

References

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

Gulstream GVII-G500 Production Aircraft Systems, Revision 1, Oct 1, 2018

Revision: 2019-04-18
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