Pneumatic – High Pressure Valve - Butterfly Clip Failure
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus Canada BD-500-1A10 and BD-500-1A11 aircraft must comply with the AD requirements effective from 22 June 2026. They are prohibited from dispatching aircraft under the specified MEL items until corrective actions are taken. Maintenance and continuing airworthiness teams should review and apply the corrected MEL item references and monitor for further AD updates.
Summary
The Pneumatic – High Pressure Valve - Butterfly Clip Failure Emergency Airworthiness Directive CF-2026-33R1 issued by Transport Canada applies to Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft models. It addresses the issue of missing or broken butterfly clips on high pressure valves that can cause bleed system isolation failure, hot air leakage, and potential structural damage. This directive mandates compliance with specific Minimum Equipment List (MEL) items to mitigate safety risks.
What changed
This revision CF-2026-33R1 corrects typographical errors found in the MEL items referenced in the original AD CF-2026-33 issued on 22 June 2026. It maintains all original requirements while clarifying the applicable MEL items and associated crew alerting system messages. The directive remains an interim action pending further regulatory updates.
Why it matters
This AD is critical for aviation professionals as it prevents unsafe flight conditions caused by latent butterfly clip failures in high pressure valves, which could lead to uncontrolled hot air leaks and structural overheating. Operators and maintenance teams must ensure compliance to avoid dispatching aircraft with affected MEL items. Accurate MEL references are essential for proper maintenance and operational decision-making.
More for Airbus BD-500 (A220 Series)
All 123- EASA AD CF-2026-49Engine Controls – Throttle Quadrant Assembly – Throttle Lever Jamming - ReplacementOct 12, 2026
- EASA PAD 26-112Fuselage – Mid Avionics Bay – ModificationSep 23, 2026
- EASA AD CF-2026-45Wings – Discrepant Fasteners at Wing to Fuselage Joint - AmendmentSep 11, 2026
- EASA AD CF-2026-40Time Limits/Maintenance Checks – New and Revised Airworthiness Limitations TasksSep 2, 2026
- EASA AD CF-2026-36Fuselage – Skin Assembly – Discrepant Fasteners at Air Data System Probe Doubler - Replacement
Get the next one by email
New ADs and bulletins for Airbus BD-500 (A220 Series), Canada BD-500-1A10 and Canada BD-500-1A11, summarized like this page, every Monday.