Britten-Norman BN2T Aeroplanes — Possible Unauthorised Installation of Modified RRC (formerly Allison) Model 250B17 or 250B17F Engines
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Owners, operators, and maintenance personnel should verify that any installation of modified Rolls-Royce Model 250B17 or 250B17F engines on BN2T aeroplanes is performed only in accordance with approved Britten-Norman modification instructions. They should avoid installing these engines on BN2T-4R or BN2T-4S variants, as no approved modification exists. For further information or service documentation, stakeholders should contact Britten-Norman Aircraft Limited or EASA.
Summary
EASA Safety Information Bulletin 2015-10 addresses the possible unauthorised installation of modified Rolls-Royce Corporation Model 250B17 or 250B17F engines on Britten-Norman BN2T series aeroplanes. The bulletin clarifies that only certain BN2T 'Turbine Islander' aircraft are approved to have these modified engines installed with a specific Britten-Norman modification. It also notes that no approved modification exists for BN2T-4R or BN2T-4S variants.
What changed
This bulletin introduces awareness that the installation of the modified Rolls-Royce Model 250B17 and 250B17F engines, featuring the 'Enhanced Power Turbine' improvement package, is only authorised on BN2T series aeroplanes with an approved Britten-Norman modification. It highlights that installing these engines without the concurrent modification is considered unauthorised. No Airworthiness Directive action is currently warranted.
Why it matters
This information is important for operators, maintainers, and owners of BN2T series aeroplanes to ensure compliance with approved engine installation procedures. Installing modified engines without the required modifications could lead to non-compliance and potential operational issues. Awareness helps maintain airworthiness and prevents unauthorised modifications that could affect aircraft safety and certification.
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