AD 77-07-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN-2A | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-2 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-20 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-21 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-26 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-27 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-3 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-6 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-8 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
| aircraft | B-N Group Ltd. | BN-2A-9 | Airworthiness Directives; Britten Norman Models BN-2A Islander and BN-2A Mk III Trislander Airplanes, All Series |
Unsafe Condition
Internal corrosion of the aileron mass balance support arm could lead to possible failure of the support arm.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the interior surface of the aileron mass balance support arm in accordance with specified service bulletin steps. Clean, protect, repair, or replace the support arm based on corrosion findings, with replacement required within 300 hours time in service or 3 months if marginal corrosion is found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours time in service after the effective date of this AD or prior to 3 years since new, whichever occurs later
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
B-N Group Ltd. Models BN-2A Islander and BN-2A Mk III Trislander airplanes, all series, except those incorporating Britten Norman Modification NB/M878.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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