AD 98-18-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes |
Unsafe Condition
Electrical system failure caused by inadequate electrical system design, which could result in the loss of the engine instruments or a possible electrical fire in the airplane's cockpit.
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Required Actions
Replace the voltage regulator and voltage-ammeter gauge, modify the auxiliary bus systems in accordance with A.M. Luton Electrical System Schematic Drawing 20075, Rev. G and E, Sheets 1, 2, and 3, dated May 15, 1998.
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Compliance Time
within the next 14 calendar months after the effective date of this AD
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Affected Aircraft
Bombardier Inc. Model Otter DHC-3 airplanes, all serial numbers, certificated in any category, modified by A.M. Luton STC No. SA3777NM.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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