AD 2016-19-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Corrosion on the thermostats and fuselage skin where the thermostats are installed, which may cause the switch mechanism to seize in the open position and prevent the activation of the associated engine air intake heater.
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Required Actions
Perform a general visual inspection of the thermostats' exterior for corrosion within 2,000 flight hours or 12 months, whichever occurs first. Replace any corroded thermostat before further flight. Inspect the fuselage skin surface for corrosion and take corrective action as necessary.
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Compliance Time
Within 2,000 flight hours or 12 months, whichever occurs first after the effective date of this AD.
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Affected Aircraft
Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers 4001 through 4184 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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