AD 85-14-51 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; Boeing Of Canada, Ltd., DeHavilland Division Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; Boeing Of Canada, Ltd., DeHavilland Division Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; Boeing Of Canada, Ltd., DeHavilland Division Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; Boeing Of Canada, Ltd., DeHavilland Division Model DHC-8-100 Series Airplanes |
Unsafe Condition
Lightning transient-induced damage to the electronic engine control units could result in unacceptable loss of power during critical phases of flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate AFM limitations prohibiting takeoff within 5 nautical miles of lightning or thunderstorms and require engine ignition selected to manual when operating below 1500 feet AGL within 5 nautical miles of such weather. Install four specified modifications within 12 months after the effective date: shielded harnesses, improved engine grounding jumpers, electrical wiring harness replacement, and SCU grounding strap installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight for AFM limitations; within 12 months after the effective date for modifications.
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Affected Aircraft
Boeing Of Canada, Ltd., DeHavilland Division Model DHC-8-100 series airplanes, serial numbers up to and including 93.
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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