Electrical Power — Circuit Breaker Switches — Inspection / Replacement
- Published
- Effective
- Deadline
- Replaces
- 2006-0134
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect affected circuit breaker switches within 200 flight hours or 12 months after the original AD effective date or during the next scheduled inspection, whichever occurs first. Replacement of specified circuit breakers with improved design parts must be completed within the same timeframe or before exceeding six years since first installation. Maintenance programs should be updated to reflect the six-year life limit, and installation of non-compliant parts is prohibited from June 5, 2006 onward.
Summary
EASA Airworthiness Directive 2019-0015 addresses inspection and replacement requirements for circuit breaker switches on ASI Aviation F 406 aeroplanes. It specifically targets affected circuit breaker switches with part numbers CM3589-50 and CM3589-20, requiring replacement with improved design parts to prevent cockpit smoke or burning smells. The directive applies to all serial numbers of the F 406 aircraft and mandates compliance with specific service bulletins.
What changed
EASA Airworthiness Directive 2019-0015 supersedes the previous AD 2006-0134, expanding the scope to include additional affected circuit breaker switches (P/N CM3589-20) and replacing the previous flight hour life limit with a six-year calendar life limit for both affected and improved parts. It introduces new replacement requirements and updates inspection criteria to enhance safety.
Why it matters
This directive is critical for operators and maintenance organizations to prevent potential electrical failures that could cause smoke or burning smells in the cockpit, which may reduce aircraft control. Compliance ensures continued airworthiness and safety of the F 406 fleet by addressing known failure modes of specific circuit breaker switches. It also impacts maintenance scheduling and parts management due to the imposed life limits and replacement mandates.
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