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9 Cards in this Set
- Front
- Back
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Cause |
Cabin differential above 5 psi |
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Bleed air valve |
ENVIR OFF |
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Action |
Request vectors and descent to safe altitude. |
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Outflow valves are stuck closed |
Check vacuum gauge for pressure. |
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Loss of vacuum the cause |
The DUMP pressurization control switch will be inoperative |
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Caution |
If loss of vacuum the cause, de-ice boots will be inoperative and exiting icing conditions, considered |
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Weather |
Check weather at maintenance base and nearest airport, request vectors and exit icing conditions. |
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Operations |
Refer to the MEL land at nearest airport/ maintenance base |
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Passengers |
Brief as required, advise of deviating to alternate |
