FAA Patches Airplane Engine Leak with Software Sorcery
Published Date: 7/30/2026
Rule
Summary
The FAA is superseding Airworthiness Directive (AD) 2025-06- 01, which applied to all Airbus Canada Limited Partnership Model BD- 500-1A10 and BD-500-1A11 airplanes. AD 2025-06-01 required revising the existing airplane flight manual (AFM) to incorporate the procedures for the flightcrew to manually isolate the opposite functional engine in the event of an engine bleed duct large leak condition. Since the FAA issued AD 2025-06-01, an electronic engine control (EEC) software update has been developed to address the unsafe condition. This AD continues to require the actions in AD 2025-06-01 and requires installing a certain EEC software update on both engines. This AD also removes airplanes from the applicability. The FAA is issuing this AD to address the unsafe condition on these products.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Mandatory EEC Software Update
The AD requires installing a specified electronic engine control (EEC) software update on both engines of affected airplanes to address the unsafe condition. This requirement is added when the FAA supersedes AD 2025-06-01 and applies to the same model type coverage in the AD.
Keep AFM Procedures Required
If you operate Airbus Canada Model BD-500-1A10 or BD-500-1A11 airplanes, the FAA is keeping the requirement from AD 2025-06-01 to revise the airplane flight manual (AFM) to add procedures for the flightcrew to manually isolate the opposite functional engine after an engine bleed duct large leak. This AD supersedes AD 2025-06-01 and continues to require that AFM revision.
Some Airplanes Removed From AD
The FAA states this AD removes certain airplanes from the rule's applicability, meaning some previously covered airplanes will no longer be subject to the AD's requirements. Operators of airplanes removed from applicability will no longer need to perform the ADed actions for those specific airplanes.
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