Fault Message:

[ACSC1-A] LH A-I PRESS XDCR /WRG

Fault Code:

2161416ECS

Associated CAS:

L PACK FAULT
(Advisory)

Left Pack Anti-Ice Pressure Sensors has been detected out of range by Air Conditioning System Controller (ACSC) 1 Channel A.

• Anti-Icing Pressure Sensor 1 (MT64)
• Air Conditioning System Controller (ACSC) 1 (A87)
• Junction Box (JB5)
• Associated Wiring

Advisory Wire/Service Bulletin:

• AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active (Global Express / XRS - 9002 to 9312, 9314 to 9380, 9384 to 9429 and Global 5000 - 9127 to 9383, 9389 to 9400, 9404 to 9431 and 9998)

Forum Articles/Infoservice/Newsletter: None

CAIMS has Pack Pressure XDCR. Data for ACSC controllers on all 4 channels. This will show sensor data and give you an idea of problem areas.

If CAIMS messages [ACSC1-A] LH PCK IN FLOW SENS/WRG, [ACSC1-A] LH PCK IN PRESS XDCR/WRG,[ACSC1-B] LH PCK IN FLOW SENS/WRG, and [ACSC1-A] LH PCK IN PRESS XDCR/WRG all shown, most possible cause is the SPDA 2 failure.

1. Check CAIMS status of the Pack Anti-Ice Pressure Sensors (SYSTEM DIAG/21-00 AIR CONDITIONING/ACSC 1-A/LRU TEST/L ACSC CH. A PACK PRESSURE SENSOR DATA).
2. Swap Pack Anti-Ice Pressure Sensor 1 with Pack Anti-Ice Pressure Sensor 2.

   1. If system checks are good, replace Pack Anti-Ice Pressure Sensor 1 and do close out.
   2. If fault remains, continue with next step.

3. Perform a wiring checks between LH Pack Anti-Ice Pressure Sensor, JB5, ACSC 1 and Gnd.

   1. If the wiring checks are not good, replace the defective associated wiring and do close out.
   2. If the wiring checks are good, continue with next step.

4. Swap ACSC 1 with ACSC 2.

   1. If system checks are good, replace ACSC 1 and do close out.
   2. If fault remains, continue with next step.

5. Replace JB5.
6. Do close out.