TM 5-3610-252-14 Table 1-1, OPERATOR  PREVENTIVE  MAINTENANCE  CHECKS  AND  SERVICES  -  Cont B . Before W - Weekly AN  -  Annually (Number) - Hundreds of Hours D - During M . Monthly s - Semiannually A - After Q . Quarterly BI -  Biannially ITEM NO 1 IN- TER VAL B/W B ITEM  TO  BE  INSPECTED PROCEDURE VAN BODY - Cont Inspect Exterior - Cont 8. Visually inspect ground connections to be sure grounding cable is connected to terminal lug and grounding rod. If necessary, clean: WARNING Electrical shock hazard. Power cable must be de-energized  before  servicing  entry  panel connections. Death can result from failure to observe  these  safety  precautions. a. Turn power off to cable. Disconnect from power source. b. Disconnect grounding lug from grounding rod. c. Clean lug, cable end,    and rod with wire brush. d. Reconnect grounding cable lug to rod. e. Disconnect  grounding  cable  end  from  entry  panel. f. Clean terminal and cable end with wire brush. g. Reconnect  grounding  cable  to  entry  panel. h. Reconnect cable to power source. Turn power on. 9. Inspect boarding ladders for: a. Secure  attachment  of  handrails. b. Steps not broken. c. Locking pins in place. For  Reediness Reporting, Equipment  Is Not  Ready/ Available  If: Grounding connec- tions are broken or missing. Steps  are broken  or will not lock in place. 1-17