Hydraulic units are much better suited to the extreme temperature requirements of aviation applications because they maintain a more constant performance over a wide temperature range. For example, gas charged airstair deployment dampers can become too weak in cold temperatures, causing the airstair to slam down into the deployed position. Conversely, they will become overcharged in very hot conditions, causing the door to hover short of the fully deployed position. A hydraulic unit will perform smoothly in both temperature conditions.

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