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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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08/09/21

Message Overview:

Message Name:

NO SIGNAL/OUT OF RANGE

Message Code:

B3-006386

Associated CAS:

L BLEED FAULT
(Advisory)

Reporting LRU: BLEED PRES SNSR1
System Description: 36-10-00
Schematic Diagram: 36-11-00
Wiring Diagram: 21-61-25

Message Description:

The BLEED PRESSURE SENSOR 1 is detected failed. No signal is received or the signal is out of range.

Possible Causes:

  • Bleed Pressure Sensor 1 (Left Bleed Pressure Transducer) (MT21)
  • Integrated Air System Controller 1 (IASC) (A55)
  • 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
Removal of the Bleed Pressure Transducer AMM 36-11-03-000-801
Installation of the Bleed Pressure Transducer AMM 36-11-03-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Check the left pressure sensor MT21, interchange or replace Bleed Pressure Transducer.
  2. Check the wiring between the differential pressure sensor MT21 and the #1 IAS Controller.
  3. Check the #1 IAS controller circuit breaker CB1 D14 & CB1 E10, reset and re-check MDC for faults.
  4. Suspect the #1 IAS controller, remove and replace Integrated Air System (IAS) Controller.
  5. Operational test Integrated Air System (IAS) Controller.

10_bleed_pressure_sensors60_lh_cbpnl

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