AD 2021-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc., Airplanes |
Unsafe Condition
outdated magnetic variation (MagVar) tables inside navigation systems, which can affect the performance of the navigation systems and result in the presentation of misleading magnetic heading references on the primary flight displays (PFDs) and multi-function displays (MFDs), positioning the airplane outside of the terrain and obstacle protection provided by instrument flight procedures and flight route designs, and can lead to significantly inaccurate heading, course, and bearing calculations.
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Required Actions
Revise the existing airplane flight manual (AFM) and applicable corresponding operational procedures to update the flight management system (FMS) limitations.
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Compliance Time
Within 60 days after the effective date of this AD
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Affected Aircraft
Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20407 inclusive, equipped with FMC-5000 flight management computers.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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