Message Name:

R BLEED DUCT AIR LEAK

Message Code:

B3-007685

An hot air leak has been detected in the RIGHT BLEED DUCTING running from the Right Bleed Valve to the Cross Bleed Valve and the Right Flow Control Valve.

• Right Bleed Duct
• Right Bleed Valve
• Cross Bleed Valve
• Right Control Valve
• Right (R) Bleed Loop Sensor 1 (MT38)
• Right (R) Bleed Loop Sensor 2 (MT40)
• Right (R) Bleed Loop Sensor 3 (MT71)
• Right (R) Bleed Loop Routing
• Associated Wiring

Advisory Wire/Service Bulletin: None

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

• Forum Article May 2013 - Challenger 300: Routing of the Bleed Air Detection Element on the Intermediate Pressure Valve - ATA 36-21

Flight Operation Notifications Manual (FONM): None

Fault Confirmation Procedure:

1. Message# = 1
2. Comp Id =.
3. {Term Definitions}
4. IAS2A-30 XX 351 11 EXCT XXXX-XXXX XXXX-XXXX XXXX-XTXX 351B: 11; RIGHT BLEED LEAK DETECT

NOTES:

• Bleed Loop Routing and Visual Aid Guide
• Troubleshooting Guide for Bleed Loops

1. Locate the short circuit or leak using the Leak Event location function.

   1. Check for short circuit at the corresponding connector.
      NOTE: Before replacing a loop always look at the loop for routing, ensure loop is not too close to the plumbing or the bleed hole on a valve. Review AMM 36-21-00-992-801 for component location. See individual loops for specific routing information.
   2. Use a Tegam meter to check capacitance and inductance between the inner and outer conductor of the corresponding loop. Perform the impedance check per the Leak detection how to.
   3. Ducting inspection is required. Check the e-seal located at the RH IPV.

Leak Event Location History

The Leak Event Location History will identify when the system posted a fault, what loop failed and a general location based on approximate fuselage/wing station and percentage location of the overheat condition.

The CH350 reports the name of the bleed loop and fuselage station or wing station and general location of the leak in percentage. A 0% location starts at the beginning of the loop and the end of the loop is 100% so a 5% indication will be 5% of the total loop length.
R BLEED LEAK

TRIM AIR LEAK

1. Once the percentage value is obtained from the MDC, refer to mapping tool representing all potential bleed leak locations in term of percentage, for each metered bleed air hole and LRU connections point. This will help to quickly troubleshoot source of the leak..
2. If the leak can not be identified, perform the system functional check IAW AMM 36-21-00-710-801

Leak Detection Test

The test will check all of the loops the IASC is monitoring and pass or fail them. This test may fail if there is a lot of action going on in the IASC, retesting may pass the failed loops. This test is disabled with the wing heat system on. Perform the initiation (IBIT) test of the bleed air leak detection loops IAW AMM 36-21-00-740-801.

RH Bleed loop information
RH Bleed loop schematic information

The test will identify if the respective loop has a short or open (>75 Ω) MT38, MT40 or MT 71 (RH system loop). Perform resistance checks on the applicable loop per AMM 36-21-00-760-801