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Aircraft Maintenance TroubleShoot > vacuum pump troubleshooting

Deice boot malfunction. Boots don't inflate

1. Check deice control valve. 2. Inspect check valves on the opposite side when boots fail to inflate on only one pump. 3. Check for air leaks in the system plumbing or in the boots themselves which can inhibit full inflation. 4. Check for hairline cracks which may develop in the boots allowing moisture to enter and freeze which creates air leaks.

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