CAP Checklist                Date: September 12, 2007       CAP#: 1039

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|x| Has the interaction with the load been checked?
     Yes. This CAP will only interact with the load in the case 
     that we must execute SCS107 if the B side heater has failed to 
     turn back on.


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|x| Has comm been identified and duration estimated accurately?
    -  Is a partial command buffer uplink possible for this CAP (uplink via 
    	26m antenna), and if so what is the worst case scenario?
    
     We will execute this CAP, if needed, during the comm on day
     2007:260:20:55-23:10. This CAP should not take more than 20
     minutes to execute. 
    
     The partial command buffer uplink is not an issue.    
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|x| If SCS slots are used, is there SCS slot contention?
     SCS107 may be used. No other SCS slots are used.
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|x| Does the CAP perform SCS slot cleanup?
     N/A.
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|x| Does the CAP set the correct format at completion?
     N/A.
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|x| What happens if comm is lost during the CAP execution?
      This depends on the state of the side B heater and/or the point
      in time during the CAP execution at which comm is lost. If the side B
      heater is on, there is no impact due to loss of comm, since this is a
      contingency CAP. If the side B heater is off and loss of comm occurs
      before either the side A or side B heater can be turned on, the loads
      would still be running and we would rely on the DH survival heaters to
      prevent the camera body from getting too cold. If both the side A & B
      heaters are off, the loads have been terminated by SCS 107 in Case 3,
      and comm is lost, there would be no loads running and we would rely on
      the DH survival heaters to prevent the camera body from getting too
      cold. If comm is lost just after the commands are sent to Enable and
      Turn On the side A DH heater, we may not recieve the TLM verifiers
      that side A heater is on. For reference, the ACIS DH survival heaters 
      would activate at -71.1C/-73.6C (primary/redundant).


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|x| Does CAP require radmon to be enabled or disabled to be compatible
    with current load?
      No.

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|x| What is the worst case scenario for the CAP execution?
    - what science can be lost?
    - does action generate significant momentum?
    - can safe mode be triggered during the CAP?
      There are 2 worst case scenarios:      

      If the DH heaters are off and no load is running, we would rely on the
      DH survival heaters to prevent the camera body from getting too cold.

      If the DH heaters are off and the loads continue (a comm loss), 
      the aspect reconstruction in the "cold" observations may be difficult.
     
      This CAP generates no momentum and will not trigger a safe mode.

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|x| List (or attach list) of products that are required (loads,
    scripts, SOPs). Include version number for scripts and SOPs.
    1. SOP_61014_DAHTR_B_ON (3.1)
    2. O_PROT_SCSCTRL
    3.

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|x| Are all products certified and do SOP and scripts have version 3.1
    or higher?

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|x| Has OC verified that all required products are available on console?

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|x| Does the CAP require an OBSID change?
      No.
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|x| If a Flight Software Patch, has the checkbook checksum been compared
    with the value in the CAP?
     N/A.
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|x| Who will be on-console and is the CAP being run at a reasonable time?
     ACIS Science Operations Team will be on-console.
     This CAP is being run at a currently scheduled comm and at a
     time that minimizes the impact on science.
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|x| Has CAP been reviewed by FD, FOM, SOT lead and OC or their designee?


Comments:




To be attached to the signed CAP.

Rev 1.7, 2 Dec 2005, DPS