EASA AD 26-112
Fuselage – Mid Avionics Bay – Modification
Summary
EASA Airworthiness Directive PAD No. 26-112 is a proposed directive addressing water ingress issues in the mid avionics bay of Airbus Canada Limited Partnership BD-500 series aeroplanes, specifically BD-500-1A10 and BD-500-1A11 models. The directive targets serial numbers 50001 through 50088 for the BD-500-1A10 and 55001 through 55476 for the BD-500-1A11. It mandates modifications to prevent fluid infiltration that could lead to system failures and increased flight crew workload.
What Changed
This proposed Airworthiness Directive introduces a requirement to apply sealant modifications in the mid avionics bay area, as detailed in ACLP Service Bulletin BD500-530017 Issue 001. It reduces the compliance time compared to the previous Canadian AD CF-2026-16, which it concurrently revokes. The directive mandates completing the modification within 2,450 flight hours after the effective date.
Why It Matters
The directive is critical for operators and maintenance organizations to prevent water ingress that can cause cascading failures of essential avionics systems, potentially compromising flight safety. Compliance ensures continued airworthiness and reduces the risk of in-flight system losses and diversions. It also aligns European requirements with Canadian regulations while imposing a more urgent compliance timeframe.
What To Do
Operators of affected BD-500-1A10 and BD-500-1A11 aeroplanes must modify the mid avionics bay by applying sealant as per ACLP Service Bulletin BD500-530017 Issue 001. This modification must be completed within 2,450 flight hours from the AD's effective date. Stakeholders should monitor the consultation period ending on 21 October 2026 and submit any comments to EASA before that date.
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