AD 93-08-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-201 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-202 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-301 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-311 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-315 | Airworthiness Directives; De Havilland Model DHC-8 Series Airplanes |
Unsafe Condition
Failure of the MLS wiring to provide a valid signal to the GPWS could result in an incorrect GPWS alert or no alert, leading to a potential controlled flight into terrain (CFIT) accident.
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Required Actions
Inspect the MLS wiring and associated connectors for damage or degradation. Correct any discrepancies found in accordance with the approved maintenance procedures. Revise the AFM to include operational limitations for MLS/GPWS interface.
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Compliance Time
Before further flight
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Affected Aircraft
De Havilland Model DHC-8 Series airplanes installed with MLS equipment and GPWS systems.
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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