AD 86-16-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes |
Unsafe Condition
Loss of elevator control and improper operation of the control system due to bending of the elevator pushrod and attachment bolt, cracks in the threaded shank of the elevator pushrod rod ends, and damage or distortion to elevator control system cables and pulleys.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 25 hours time-in-service after the effective date, visually inspect the elevator pushrod, attachment bolt for bending, threaded shank for cracks, and cables/pulleys for damage. Replace unserviceable parts with specified parts (C3-CF-633-1 pushrod, NAS1954-24D bolt) prior to further flight. Within 60 days, replace elevator pushrod and rudder pushrod bolts if no damage found. Adjustments require FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service after the effective date of this AD, unless already accomplished. For parts replacement, prior to further flight. Additional requirements within 60 days after the effective date if no damage found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Viking Air Limited Model DHC-3 (all serial numbers) airplanes certificated in any category.
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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