AD 88-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; DEHAVILLAND Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; DEHAVILLAND Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; DEHAVILLAND Model DHC-8-100 Series Airplanes |
| aircraft | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; DEHAVILLAND Model DHC-8-100 Series Airplanes |
Unsafe Condition
Erroneous Flight Director or Autopilot VOR operations
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Required Actions
Include a limitation in the AFM's limitations section prohibiting operation in Flight Director VOR and VOR approach mode, or Autopilot VOR and VOR approach mode. Install a placard adjacent to the Flight Guidance Controller stating 'VOR MODES PROHIBITED'. Install DADC P/N 7000700-975 Mod BF per Service Bulletin A8-34-53 Rev B.
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Compliance Time
Within 48 hours after the effective date of this AD
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Affected Aircraft
Bombardier Inc. Model DHC-8-101, DHC-8-102, DHC-8-103, DHC-8-106, Post Mod. 8/0794 (Digital Air Data Computer P/N 7000700-975), not equipped with an Electronic Flight Instrument System (EFIS)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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