Message Name:

STORED FAULTS AND SYSTEM DIAGNOSTIC PAGES MISSING FROM CAIMS

After the Central Aircraft-Information Maintenance System (CAIMS) function starts on the Portable Maintenance-Access Terminal (PMAT), the STORED FAULTS and SYSTEM DIAG pages are not available because there is a problem with the interlocks.

• Portable Maintenance Access Terminal (PMAT) (AM-200)
• Junction Box 3 (JB3)
• Integrated Avionics Computer 1 (IAC) (A11)
• Integrated Avionics Computer 2 (IAC) (A10)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

CAIMS PAGE Displayed on PMAT

Normal Page	Missing Menu

1. Make sure the CAIMS interlock conditions are met.

   • Aircraft Weight-on-wheels
   • Wheel speed less than 50 knots

2. Access CAIMS. At the top of the CAIMS window, select "View" and then "Environment Settings". Are both Interlock conditions active (marked with a black dot)?

   1. If only one of the conditions is not met, troubleshoot the related system (WOW or wheel speed) and do close out.
   2. If both conditions are met or are not met, continue with next step.

3. On the center pedestal reversion control panel, set the SG1 switch to ALTN. Is the fault resolved?

   1. If NO, go to step 7.
   2. If YES, continue with next step.

4. Remove IAC 1 and Junction Box 3. Perform a continuity check as follows:

   From	To	Result
   JB3DP1-11F	Ground
   JB3DP1-9G	Ground

   1. If there is continuity, repair defective wiring as required and do close out.
   2. If there is no continuity, continue with next step.

5. Perform a continuity check as follows:

   From	To	Result
   JB3DP1-11F	A11AP1-40
   JB3DP1-9G	A11AP1-41

   1. If there is no continuity, repair defective wiring as required and do close out.
   2. If there is continuity, continue with next step.

6. Interchange IAC 1 with IAC 2. Is the fault resolved?

   1. If YES, replace defective IAC and do close out.
   2. If NO, go to step 11.

7. Remove JB3. Access and disconnect PMAT connector P251. Perform a continuity check as follows:

   From	To	Result
   P251-13	Ground
   P251-15	Ground

   1. If there is continuity, repair defective wiring as required and do close out.
   2. If there is no continuity, continue with next step.

8. Perform a continuity check as follows:

   From	To	Result
   P251-13	JB3DP1-11G
   P251-15	JB3DP1-9H

   1. If there is no continuity, repair defective wiring as required and do close out.
   2. If there is continuity, continue with next step.

9. Remove PCB1 from JB3. Perform a continuity check inside JB3 as follows:

   From	To	Result
   JB3DJ1-11G	Ground
   JB3DJ1-9H	Ground

   1. If there is continuity, replace JB3 and do close out.
   2. If there is no continuity, continue with next step.

10. Perform a continuity check inside JB3 as follows:

    From	To	Result
    JB3DJ1-11G	P1-57
    JB3DJ1-9H	P1-38

    1. If there is no continuity, replace JB3 and do close out.
    2. If there is continuity, continue with next step.

11. Replace JB3 PCB1. Is the fault resolved?

    1. If YES, do close out.
    2. If NO, continue with next step.

12. Replace PMAT.
13. Do close out.