EASA AD CF-2026-48
Pneumatic – 10th and 14th Stage Bleed Duct Damaged or Missing Insulation
Summary
The Canadian Airworthiness Directive CF-2026-48 addresses missing or damaged insulation on the 10th and 14th stage bleed air ducts of Mitsubishi Heavy Industries RJ Aviation ULC (formerly Bombardier Inc.) CL-600-2B19 aircraft. This directive mandates updated inspection and maintenance procedures to prevent structural integrity loss in the engine pylons caused by heat radiation from uninsulated bleed ducts.
What Changed
CF-2026-48 introduces new requirements to use updated Aircraft Maintenance Manual (AMM) tasks when removing the 10th and 14th stage bleed air ducts. These tasks include inspecting the engine pylon structure surrounding the affected ducts for damage. The directive supplements previous directives CF-2025-65 and CF-2023-19 by adding these specific inspection and maintenance steps.
Why It Matters
This directive is critical for aviation maintenance and compliance teams to prevent potential structural damage to engine pylons due to heat exposure from missing or damaged insulation. Ensuring adherence to the updated AMM tasks helps maintain aircraft safety and airworthiness, reducing the risk of costly repairs or operational disruptions.
What To Do
Starting from the effective date of October 8, 2026, operators and maintenance organizations must follow the updated AMM procedures dated June 30, 2026, or later when removing the 10th or 14th stage bleed air ducts. Specifically, tasks 36–11–35–000–802 and 36–12–00–000–801 must be used to inspect and maintain the affected areas. Compliance is mandatory before any further removal of these ducts.
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