AD 2011-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine |
| engine | Rotax | Aircraft | Airworthiness Directives; Various Aircraft Equipped With Rotax Aircraft Engines 912 A Series Engine |
Unsafe Condition
Deviation in hardening of certain Part Number (P/N) 944072 washers exceeds the hardness of the design specification, which could lead to cracks in the washer, loosening of the magneto flywheel hub, and consequent ignition failure.
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Required Actions
Replace the P/N 944072 washer and associated gasket ring P/N 950141 with serviceable parts having the same P/N. Prohibit installation of an affected engine on an aircraft unless the washer has been replaced as required.
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Compliance Time
Before further flight
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Affected Aircraft
Various aircraft equipped with Rotax Aircraft Engines 912 A Series Engine, specifically those with affected P/N 944072 washers installed on a limited number of engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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