AD 90-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-6-1 | Airworthiness Directives; BOEING OF CANADA, LTD., DEHAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-100 | Airworthiness Directives; BOEING OF CANADA, LTD., DEHAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-200 | Airworthiness Directives; BOEING OF CANADA, LTD., DEHAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
| aircraft | Viking Air Limited | DHC-6-300 | Airworthiness Directives; BOEING OF CANADA, LTD., DEHAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 Airplanes |
Unsafe Condition
Failure of the elevator pushrod assembly due to fatigue cracking, leading to loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the aft elevator control quadrant to elevator control horn pushrod and rod ends. Visually inspect pushrod and rod ends for damage and bearing rotation. Clean rod ends and inspect for cracks using fluorescent dye penetrant. Replace any bent, corroded, cracked, or seized pushrods, rod ends, or bearings with serviceable parts. Submit a written inspection report within one week to the FAA New York Aircraft Certification Office. Retain defective parts for 60 days if requested by FAA.
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 (TIS) after the effective date of this AD unless previously accomplished within the last 25 hours TIS prior to the effective date
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BOEING OF CANADA, LTD., DEHAVILLAND Models DHC-6-1, DHC-6-100, DHC-6-200, and DHC-6-300 (all serial numbers)
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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