AD 83-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN2A MK. III | Airworthiness Directives: Pilatus Model BN-2A MK III Trislander Series Airplanes |
| aircraft | B-N Group Ltd. | BN2A MK. III-2 | Airworthiness Directives: Pilatus Model BN-2A MK III Trislander Series Airplanes |
| aircraft | B-N Group Ltd. | BN2A MK. III-3 | Airworthiness Directives: Pilatus Model BN-2A MK III Trislander Series Airplanes |
Unsafe Condition
Structural failure of the rudder drive lever support assembly and loss of rudder control.
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Required Actions
Replace rudder drive lever support assembly attachment rivets with bolts per Britten-Norman SB No. BN-2/SB.102, Issue 1. Visually inspect rudder lever mounting channels for cracks. Depending on crack length, either repeat inspections every 100 hours, stop drill cracks and install modification within 25 hours, or stop drill and modify before further flight. Adjust inspection intervals up to 10% for maintenance scheduling. Discontinue inspections after modification installation. Use equivalent methods only with FAA approval.
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Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
Pilatus Model BN-2A MK III Trislander Series airplanes (all serial numbers), not incorporating Britten-Norman Mod. NB/M/908
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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