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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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02/02/21

Message Overview:

Message Name:

IASC-2 PRESS SNSR FAIL

Message Code:

B3-006913

Associated CAS:

CABIN PRESS FAULT
(Caution)

Reporting LRU: IASC2 TST A
System Description: 21-23-00
Schematic Diagram: None
Wiring Diagram: 31-41-11

Message Description:

The internal pressure sensor of the IASC-2 is detected out of range or disagrees with the Air Data Computer data and the IASC-1 sensor is detected.

Possible Causes:

  • Integrated Air System Controller (IASC-2) (A56)
  • Integrated Air System Controller (IASC-1) (A55)
  • Air Data Computer (ADC) (A1)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Integrated Air System (IAS) Controller AMM 21-31-01-000-801
Installation of the Integrated Air System (IAS) Controller AMM 21-31-01-400-801
Operational Test of the Integrated Air System (IAS) Controller AMM 21-31-01-710-801
Standard Practices - Replace Wiring SPM 20-12-00-02
Standard Practices - Wire Repair SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Check the #2 IAS controller circuit breaker CB2 D14 & CB2 E10, reset and re-check MDC for the bus fault.
  2. Check the air data computer altitude on the PFDs for reasonable indication. If the Air Data Computer indication appears to be incorrect for the conditions (maintenance should see field elevation) then troubleshoot the Air Data Computer system.
  3. Compared the #1 IASC LRU testing raw data (Description 21-23-00), PRESS/TEMP SENSOR STATUS page to the #2 IASC. The Cabin pressure indications should match and be equivalent to actual aircraft conditions, maintenance should see ambient pressure indications. Replace either IASC if they do not match these conditions.
  4. Suspect the #2 IAS controller, remove and replace Integrated Air System (IAS) Controller.
  5. Operational test of the Integrated Air System (IAS) Controller.

60_rh_cbpnl10_iasc2_cha_press_control_sensor_page

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