AD 2010-20-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
Unsafe Condition
Three cases of in-flight loss of cabin pressurization have been reported, resulting from failure of a bulkhead check valve in combination with failure of an air supply duct.
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Required Actions
Revise the approved maintenance schedule to incorporate a 3000 flight-hour periodic discard task for bulkhead check valves, Part Numbers 92E20-3 and 92E20-4. Insert Bombardier Temporary Revision (TR) 1-2-39, dated December 12, 2008, into the Maintenance Requirement Manual (MRM) to include Bombardier Task 21-51-21-13 in Part 2 of the Airworthiness Limitations section.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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