FAA SAIB CE-08-33 - Unison Industries (Slick) Magneto Carbon Brushes
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected stakeholders should comply with the inspection procedures outlined in Unison Industries Service Bulletin SB3-08 and remain vigilant during magneto ignition checks before flights and maintenance. They should also consult relevant engine and aircraft manufacturer service information for any additional requirements. No mandatory compliance deadline is specified, but ongoing inspections are advised until further manufacturer guidance is issued.
Summary
FAA Special Airworthiness Information Bulletin CE-08-33 is an advisory concerning service problems with carbon brushes installed in Unison Industries (Slick) magnetos. These magnetos are commonly installed on Lycoming and Teledyne Continental reciprocating engines used in various general aviation aircraft certified under CS/JAR/FAR Part 23. The bulletin alerts operators and maintenance personnel to premature carbon brush wear that could affect magneto performance and engine power consistency.
What changed
This bulletin introduces awareness of premature wear issues in certain serial number ranges of Slick magneto carbon brushes and recommends compliance with Unison Industries Service Bulletin SB3-08 for inspections. It does not mandate corrective actions or issue an airworthiness directive but emphasizes ongoing inspection requirements until a terminating action is developed by the manufacturer.
Why it matters
This information is critical for aviation professionals to prevent potential magneto failures that could lead to engine power loss. Operators, maintenance organizations, and manufacturers must monitor magneto condition closely to maintain engine reliability and safety. Understanding this advisory helps ensure timely detection of wear and adherence to recommended inspection intervals.
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