Message Name:

Air Conditioning Synoptic Pack Boxed White

The Air Conditioning Synoptic page displays a white outline around the Pack and the Pack is not selected off.

• Left Pack Inlet Flow Sensor (PIFS) (MT66)
• Right Pack Inlet Flow Sensor (PIFS) (MT109)
• Left Pack Inlet Pressure Sensor (PIPS) (MT65)
• Right Pack Inlet Pressure Sensor (PIPS) (MT108)
• Left Pack Inlet Temperature Sensor (PITS) (E23)
• Right Pack Inlet Temperature Sensor (PITS) (E29)
• Left Flow Control Valve (FCV) (L24)
• Right Flow Control Valve (FCV) (L30)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTE: This troubleshooting scenario may not have a CAS message or CAIMS Fault code posted.

1. Confirm that no active CAS message or CAIMS Fault code is posted, troubleshoot active CAS message or CAIMS Fault code first.
2. Is the Air Conditioning synoptic page showing left or right Pack outlined in White and the Pack is not selected off?

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

3. Select the left & right Pack on then off and visually confirm that the Flow Control Valve is cycling with Pack switch command. Visually confirm that the Air Conditioning synoptic changes with the selection. Are the results satisfactory?

   1. If YES, step 6.
   2. If NO, continue next step.

4. Manually open the Flow Control Valve in the equipment bay. Did this resolve the issue?

   1. If YES, step 6.
   2. If NO, continue next step.

5. Close Flow Control Valve on side with the issue and perform wiring checks. Ensure that the terminations at the ground studs are properly torqued and will carry a load. Are results satisfactory?

   1. If NO, perform wire repairs.
   2. If YES, continue next step.

   Left Flow Control Valve	Right Flow Control Valve
   From To Expected Results Results L24P1-8 GS249 Continuity L24P1-5 GS250 Continuity L24P1-7 L24P1-8 Continuity	From To Expected Results Results L30P1-8 GS290 Continuity L30P1-5 GS289 Continuity L30P1-7 L30P1-8 Continuity

6. When packs are cooled (OFF for approximately 1 hr ), complete the attached ECS Data Table using the PMAT (with packs and bleed OFF) and submit to CRC via email.
7. To access this data:

   1. Open CAIMS

      1. Click on SYSTEM DIAG (at the bottom)
      2. Click on ATA 21
      3. Click on AIR COND. SYST. CNTR. 1-A
      4. Click on LRU TEST
      5. Click on L ACSC CH.A PACK TEMP. SENSOR DATA
      6. Record data on spreadsheet
      7. Click on RETURN
      8. Click on L ACSC CH.A PACK PRESSURE XDCR DATA
      9. Record data on ECS Data Table
      10. Click on EXIT SUBSYS
      11. Repeat steps 4 to 11 for AIR COND. SYST. CNTR. 1-B, 2-A and 2-B
      12. Click on RETURN MAIN (back to the first page of CAIMS)
      13. Click on SYSTEM DIAG (at the bottom)
      14. Click on ATA 36
      15. Click on BLEED MANAGEMENT CNTR. 1
      16. Click on LRU TEST
      17. Click on L BMC DISCRETE & ANALOG INPUT DATA
      18. Record data (at the bottom) for the LH INTERMEDIATE PRESS.
      19. Click on EXIT SUBSYS
      20. Repeat steps 16 to 19 for the BLEED MANAGEMENT CNTR. 2

8. Review the data recorded in the ECS Data Table, does the data for the Pack inlet Pressure sensor (PIPS) align side to side and is the data within tolerance?

   1. If YES, continue with step 10.
   2. If NO, continue with next step.

9. Interchange the Pack inlet Pressure sensor (PIPS). Did issue move to other PACK?

   1. If YES, replace defective Pack Inlet Pressure Sensor (PIPS).
   2. If NO, interchange Pack Inlet Pressure Sensor (PIPS) to original location.

10. Review the data recorded in the ECS Data Table, does the data for the Pack inlet flow sensor (PIFS) align side to side?

    1. If YES, continue with step 12.
    2. If NO, continue with next step.

11. Interchange the PIFS. Did issue move to other PACK?

    1. If YES, replace defective Pack Inlet Flow Sensor (PIFS).
    2. If NO, interchange Pack Inlet Flow Sensor (PIFS) to original location.

12. Review the data recorded in the ECS Data Table, does the data for the Pack Inlet Temperature sensor (PITS) align side to side?

    1. If YES, continue with step 14.
    2. If NO, continue with next step.

13. Interchange the Pack Inlet Temperature Sensor (PITS). Did issue move to other PACK?

    1. If YES, replace defective Pack Inlet Temperature Sensor (PITS).
    2. If NO, interchange PITS to original location.

14. If the data recorded in the ECS Data Table did not reveal any abnormal indications and you have not interchanged the three (3) sensors at this point in the troubleshooting. Continue with next step.
15. Interchange the PIPS. Did issue move to other PACK?

    1. If YES, replace defective Pack Inlet Pressure Sensor (PIPS).
    2. If NO, interchange Pack Inlet Pressure Sensor (PIPS) to original location.

16. Has the issue been resolved?

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

17. Interchange the Pack Inlet Flow Sensor (PIFS). Did issue move to other PACK?

    1. If YES, replace defective Pack Inlet Flow Sensor (PIFS).
    2. If NO, interchange Pack Inlet Flow Sensor (PIFS) to original location.

18. Has the issue been resolved?

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

19. Interchange the PITS. Did issue move to other PACK?

    1. If YES, replace defective Pack Inlet Temperature Sensor (PITS).
    2. If NO, interchange Pack Inlet Temperature Sensor (PITS) to original location.

20. Do close out.