Filters and Air Driers
The element of cartridge type filter units should be removed and replaced by anew element when necessary. Before fitting the element the filter casing and connecting union orifice should be cleaned with the recommended cleaning agent as prescribed in the relevant Aircraft Maintenance Manual.
Checks should be made on the condition of Silica Gel Crystals and the appropriate air drier containers recharged as necessary. The condition of sealing rings should also be checked.
Baffle type air driers should be checked for security paying particular attention to the condition of the sealant. The filter gauze which is also provided must be free from corrosion and cleaned with the recommended cleaning agent.
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