I t em No. Interval E q u i p m e n t  I s  N o t B    D   A   W READY/AVAILABLE IF: 20 TM 10-3930-643-10 Operator/Crew     Preventive     Maintenance     Checks     and     Services NOTE  : Within    designated    interval,    these    checks    are    to    be performed    in    the    order    listed. B   -    Before D    -   During A - After W -    W e e k ly Item    To    Be    Inspected Procedure:    Check    and    have    repaired,    filled or    adjusted    as    needed. FAN    AND    DRIVE    BELTS a.    Check    belts    for    frayed    or    damaged condition. b. Check     fan     for     bent     or     damaged blades. Belts    are    damaged or    missing. Blades     are     bent     or damaged 2-29