AD 98-20-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-301 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-311 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-315 | Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes |
Unsafe Condition
Corrosion forming on areas of the airplane structure where black film thermal insulation is used, leading to degradation of structural capability and sudden loss of cabin pressure due to fuselage corrosion.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect fuselage structure for corrosion where black film thermal insulation is used; repair corrosion if necessary; replace black insulation blankets with aluminized (silver) insulation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within one year after the effective date of the AD
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Affected Aircraft
Bombardier Model DHC-8-100 and -300 series airplanes (DHC-8-101, -102, -103, -106, -301, -311, -315) listed in Bombardier Service Bulletin S.B. 8-21-68, serial numbers 003 through 381 inclusive.
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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