Pneumatic — 10th and 14th Stage Bleed Duct Damaged or Missing Insulation
- Published
- Effective
- Replaces
- 2023-19
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of MHI RJ Aviation ULC CL-600-2B19 aircraft must perform a visual inspection of the engine pylon structure within 48 months or 6600 flight hours from March 27, 2023, using the specified service bulletin. Additionally, they must incorporate detailed inspections of the 10th and 14th stage bleed ducts into their ongoing maintenance schedules as per the updated Certification Maintenance Requirements. Compliance with previous AD CF-2023-19 inspections satisfies initial requirements.
Summary
The Canadian Airworthiness Directive CF-2025-65 addresses damaged or missing insulation on the 10th and 14th stage bleed ducts of MHI RJ Aviation ULC model CL-600-2B19 aircraft. This directive mandates inspections and maintenance requirements to ensure the structural integrity of engine pylons by preventing heat damage from uninsulated bleed ducts. It applies to all serial numbers of the specified aircraft model.
What changed
Airworthiness Directive CF-2025-65 updates the applicability of the previous directive CF-2023-19 and revises the Certification Maintenance Requirements by introducing inspections for both the 10th and 14th stage bleed ducts. It maintains the original inspection requirements for the engine pylon structure while adding new recurring inspection tasks for the bleed duct insulation condition.
Why it matters
This directive is critical for aviation professionals because missing or damaged insulation on bleed ducts can cause heat damage that compromises engine pylon structural integrity, posing safety risks. Operators and maintenance teams must comply to avoid potential structural failures and ensure continued airworthiness. The directive also clarifies compliance pathways and integrates these inspections into routine maintenance programs.
More for MHI RJ Aviation CL-600 (Regional Jet)
All 84- EASA AD CF-2026-48Pneumatic – 10th and 14th Stage Bleed Duct Damaged or Missing InsulationOct 7, 2026
- EASA AD CF-2026-43Ice and Rain Protection – Wing Anti-Ice – Aircraft Flight Manual Procedure Anomaly - AmendmentSep 11, 2026
- EASA AD CF-2026-09R2Ice and Rain Protection – Engine Cowl Anti-Ice – Ejector Pipe ChafingAug 5, 2026
- EASA AD CF-2026-07R1Ice and Rain Protection – Engine Cowl Anti-Ice – Ejector Pipe ChafingJun 22, 2026
- EASA AD CF-2026-09R1
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