AD 2023-21-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
| aircraft | Bombardier | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes |
Unsafe Condition
missing or damaged insulation in the engine pylon area
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
inspecting the engine pylon structure for discrepancies and repair if necessary, revising the existing maintenance or inspection program to incorporate a new certification maintenance requirement (CMR) task
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 48 months or 6,600 flight hours, whichever occurs first after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MHI RJ Aviation ULC Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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