AD 2006-20-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | DHC-8-102 | Airworthiness Directives; Bombardier Model DHC-8-102, -103, and -106 Airplanes, and Model DHC-8-200 and DHC-8-300 Series Airplanes |
Unsafe Condition
Reports of several failures of the elevator trim chain due to hydrogen embrittlement. Breakage of the elevator trim chain would prevent the actual position of the elevator trim tab from being annunciated to the flightcrew.
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Required Actions
Perform a one-time general visual inspection for non-conforming chain links of chain assemblies of the elevator trim system and gust lock system, and take corrective actions if necessary. Revise the applicable airplane flight manual (AFM) within 30 days after the effective date of this AD by incorporating the information in the applicable temporary amendments (TAs) into the AFMs.
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Compliance Time
Within 30 days after the effective date of this AD for AFM revisions. Inspection compliance time not explicitly stated.
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Affected Aircraft
Bombardier Model DHC-8-102, -103, and -106 airplanes, and Model DHC-8-200 and DHC-8-300 series airplanes, certificated in any category, as identified in Bombardier Service Bulletin 8-27-105, Revision A, dated September 13, 2005.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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