AD 99-17-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-201 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-202 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-301 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-311 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-315 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-400 | Airworthiness Directives; Bombardier Model DHC-8 Series Airplanes |
Unsafe Condition
An asymmetric rudder force condition, which could result in reduced controllability of the airplane and consequent potential for center line deviation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a one-time visual inspection of the spring assemblies in the rudder control feel unit to verify dual rate configuration springs are installed. If single rate springs are found, revise the AFM to prohibit operation from runways less than 75 feet wide before further flight. Replace any single rate springs with dual rate springs within 36 months of the effective date.
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Compliance Time
Within 100 flight hours or 14 days after the effective date, whichever is later, for the inspection. AFM revision required before further flight if needed. Spring replacement due by 36 months after effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Model DHC-8 series airplanes listed in Bombardier Alert Service Bulletin S.B. A8-27-82, certified 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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