TM 9-2350-287-10Table 2-1. Preventive Maintenance Checks and Services for Model M992A1LocationItem Interval No.Item toCrewmemberNot Fully MissionCheck/Capable If:ProcedureServiceDRIVER54 Weekly M45 Peri-CAUTIONscopesHandle periscopes carefully duringremoval, to avoid damaging frameand glass.a. Remove periscope by looseningtwo thumbscrews.b. Check between carrier wall andb. Any periscope isperiscope for dirt or moisture.missing or unser-viceable, or over50% of vision isobstructed.COMMANDER55 Weekly M27 Peri-Check for damage and cleanliness.Periscope is missingscopeor over 50% ofvision is obstructed56[Text and Art Deleted]2-74Change 1
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