AD 76-13-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-6-1 | Airworthiness Directives; de Havilland Model DHC- 6 Series Twin Otter Aircraft |
| aircraft | Viking Air Limited | DHC-6-100 | Airworthiness Directives; de Havilland Model DHC- 6 Series Twin Otter Aircraft |
| aircraft | Viking Air Limited | DHC-6-200 | Airworthiness Directives; de Havilland Model DHC- 6 Series Twin Otter Aircraft |
| aircraft | Viking Air Limited | DHC-6-300 | Airworthiness Directives; de Havilland Model DHC- 6 Series Twin Otter Aircraft |
Unsafe Condition
Excessive removal of lightning strike protection bonding strap material during installation of wing tip strobe lights compromises aircraft lightning strike protection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Accomplish alteration to wing tips per DeHavilland Service Bulletin No. 6/318 or equivalent approved alteration. Compliance must be within 100 hours in service after the AD's effective date, with possible extension upon request and FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
DeHavilland Model DHC-6 series Twin Otter aircraft serial nos. 1 thru 430 with wing tip strobe lighting installed.
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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