AD 2013-13-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; B-N Group Ltd. Airplanes |
Unsafe Condition
Inadequate sealing of the fuel filler cap (fuel tank cap) and the fuel filler receptacle (fuel tank opening), which could lead to contaminated fuel and result in in-flight shutdown of the engine.
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Required Actions
Inspect the aircraft fuel replenishment points to determine that the fuel filler cap matches the fuel filler receptacle. If a mismatch is found, install the correct fuel filler cap within 3 calendar months. Perform daily pre-flight water contamination checks of the gascolators and fuel tank sump drains if a mismatch is found, until the correct fuel filler cap is installed.
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Compliance Time
Within 30 days after August 1, 2013, for the initial inspection. Within 3 calendar months after August 1, 2013, for installing the correct fuel filler cap if a mismatch is found. Daily pre-flight checks are required until the correct fuel filler cap is installed.
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Affected Aircraft
B-N Group Ltd. Models BN-2, BN-2A, BN2A MK. III, BN2A MK. III-2, BN2A MK. III-3, BN-2A-2, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-27, BN-2T, and BN-2T-4R airplanes, all serial numbers, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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