AD 96-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; de Havilland Model DHC-3 Airplanes |
Unsafe Condition
Failure of the tailplane structure caused by cracked tailplane main rib forward flanges or main rib forward lower flanges at the tailplane front attachment fitting, which could result in loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect, using dye penetrant methods, the tailplane main rib forward flanges and main rib forward lower flanges at the tailplane front attachment fitting in accordance with de Havilland SB No. 3/46, Revision B. Repair any cracked flanges prior to further flight. Installing Modification 3/935 per SB 3/50, Revision A terminates the repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 3 calendar months after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 24 calendar months.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
de Havilland Model DHC-3 airplanes (all serial numbers) without Modification 3/935 incorporated per SB 3/50, Revision A.
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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