Indicating / Recording System — Engine Chip Detector Short to Ground
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bell 505 helicopters must replace the specified relay panel assembly within 25 hours air time or 30 days from the effective date of the directive, whichever occurs first. The replacement must be done following the instructions in Bell Helicopter Textron Canada Limited Alert Service Bulletin 505-17-04 or a later approved revision.
Summary
The Airworthiness Directive CF-2017-36 is issued by Transport Canada and applies to Bell Helicopter Textron Canada Limited model 505 helicopters with specific serial numbers. It addresses an issue in the indicating and recording system related to the engine chip detector causing a short to ground, which affects the display of critical flight parameters on the Primary Flight Display and Multi-Function Display.
What changed
This new Airworthiness Directive introduces a mandatory replacement of the relay panel assembly part number SLS-075-002-107 with part number SLS-075-002-109. The replacement is required to prevent the short to ground condition caused by metallic debris in the engine oil lubrication system that leads to loss of important flight system indications.
Why it matters
This directive is important because the short to ground condition results in the loss of multiple critical flight parameters and system warnings, which compromises flight safety. Operators and maintenance teams must address this unsafe condition promptly to ensure reliable engine monitoring and flight system performance, thereby maintaining safe helicopter operations.
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- EASA AD CF-2025-62Fuselage — Tailboom — Elongated Holes and Gaps on Tailcone AssemblyDec 5, 2025
- EASA AD CF-2025-35Levelling and Weighing — Aft Moveable Ballast Box Assembly Door Hinge FailureJul 9, 2025
- EASA AD CF-2025-32
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New ADs and bulletins for Bell 505 (Jet Ranger X) and Helicopter Textron Canada Limited 505, summarized like this page, every Monday.