L COWL A/ICE FAULT
(Advisory)

Left Cowl Anti-Ice Valve has fault.

• The cowl anti-ice valve does not control the bleed air.
• The cowl anti-ice valve is failed closed with the engine stopped.
• The cowl anti-ice valve position indication is failed.

• Left Cowl Anti-Icing Valve (CAIV)
• Bleed Management Controller (BMC) (A69)

Advisory Wire/Service Bulletin:

• AW700-36-0365 - Bleed Monitoring Controller - Data Gathering to Reduce No Fault Found (NFF) rate

Forum Articles/Infoservice/Newsletter: None 

Flight Operation Notifications Manual (FONM):

•  [ Global Express ]  [ G5000 ]  [ Global XRS ] ICE-001, [COWL A/ICE FAULT] (Advisory/Cyan) After Engine Shutdown.

NOTES: 

• To avoid the display of any Bleed related CAS nuisance message after replacement of BMC due to internal failure, follow AW700-36-0365 instructions.
• BMC NFF Action:
  -To support the technical investigation, FSRs and Service Centers are requested to perform an NVM download and complete a condition report and (BMC) PN GG546-1017-XX questionnaire when troubleshooting or removing a Bleed Management Controller (BMC) PN GG546-1017-XX.

1. Did the L COWL A/ICE FAULT cyan CAS message appear during or after engine shutdown?

   1. If YES, continue with next step.
   2. If NO, go to step 9.

2. Ensure the engine has been shut down for at least 1 minute and the Cowl Anti-Ice Valve (CAIV) is selected OFF.
3. Check the actual position of the CAIV by using the BLEED/AINTI-ICE synoptic page.
   
4. Is the CAIV displayed as OPEN on the synoptic page?

   1. If YES, continue with next step.
   2. If NO, go to step 6.

5. Is the L COWL A/ICE FAULT advisory CAS message still present?

   1. If YES, continue with next step.
   2. If NO, no further action is required. Do close out.

6. Open the COWL doors and locate the CAIV.
7. Check the CAIV V-Band clamps position.

   1. If the V-Band clamps are installed 90° off-set from each other, continue with next step.
   2. If the V-Band clamps are not installed 90° off-set from each other, re-orientate the V-Band clamps so that they are oriented 90° from each other.
      

8. Verify the valve butterfly position by observing the Output Shaft (OPS) position.

   1. If the OPS is retracted and the CAIV is displayed CLOSED on the Bleed Air/Anti-Ice synoptic page, go to step 10.
   2. If the OPS is fully extended, replace the CAIV and do close out.
      

9. Check the Pressure Transducer vent hole for installation clamp obstruction. Obstructing the Pressure Transducer vent hole will result in false pressure measurements and the display of CAI error messages.

   1. If the Pressure Transducer vent hole is covered by the installation clamps, rectify as required (see image below) and do close out.
   2. If the Pressure Transducer vent hole is not obstructed, continue with next step.
      

10. Using the PMAT, access the Active Faults/Stored Faults as per AMM Tasks.
11. Select related CAIMS message below:
    Select an Item3615315BMC - LEFT COWL AI VALVE CMD /L CAIV3615425BMC - LEFT COWL AI PRESSURE XDCR /WRG
12. Do close out.