TM 9-4120-371-14
Check filter for punctures, cuts, and damaged edges that would allow passage of unfiltered air.
Check filter for packed or mashed areas that would block airflow.
Replace air filter if found bad.
Check air filter for accumulated dirt.
Wash filter in a mild detergent and water solution.
Rinse thoroughly in clear water.
Shake out excess water prior to installation.
Slip air filter into place. (Be sure that air flow arrow is pointing up.)
Secure filter with filter retainer spring clips.
(2) Actuator hood screen inspection/cleaning.
Check that screen is in place and in good condition.
Check that screen is clean and free of all blockages.
If dirty clean with a stiff brush.