Airworthiness directives › 2021-07-06
AD 2021-07-06 Airworthiness Directives; Bombardier, Inc., Airplanes
Applicability*9
This AD applies to Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants), serial numbers 5301 through 5665 inclusive, and 5701 through 5988 inclusive, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 60 days after the effective date of this AD: Revise the existing AFM to incorporate the information specified in Section 02-09, Navigation Systems Limitations, of Chapter 2—LIMITATIONS, of the applicable Bombardier Challenger AFM specified in figure 1 to paragraph (g) of this AD. ER06AP21.000
Unsafe condition
This AD was prompted by a determination that certain airplanes have outdated magnetic variation (MagVar) tables inside navigation systems. The FAA is issuing this AD to address outdated MagVar tables inside navigation systems, which can affect the performance of the navigation systems and result in the presentation of misleading magnetic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of the terrain and obstacle protection provided by instrument flight procedures and flight route designs ( e.g., outdated MagVar tables can lead to significantly inaccurate heading, course, and bearing calculations).
Affected ADs
None.
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