Navigation — Required Navigation Performance Authorization Required (RNP-AR) Approach Vertical Deviation
- Published
- Effective
- Replaces
- 2024-22
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier BD-700-2A12 aeroplanes must amend the Transport Canada approved Airplane Flight Manual by incorporating Supplement 10 – RNP-AR Approach Operations, Temporary Revision TR-58 dated 21 March 2024 or later approved revisions. Flight crews must be informed of these changes and operate the aircraft accordingly. Compliance is required within 30 days from 27 June 2024 unless already accomplished.
Summary
The Navigation — Required Navigation Performance Authorization Required (RNP-AR) Approach Vertical Deviation Airworthiness Directive CF-2024-22R1 applies to Bombardier Inc. model BD-700-2A12 aeroplanes, serial numbers 70005 through 70193. This directive addresses vertical deviation issues during RNP-AR approaches caused by partial engine thrust loss under certain conditions. It mandates updates to the Airplane Flight Manual to ensure safe approach containment and obstacle clearance.
What changed
Airworthiness Directive CF-2024-22R1 revises the applicability of the previous AD CF-2024-22 by limiting the affected aircraft population to specific serial numbers. It maintains the original requirements but excludes newer production aeroplanes that already incorporate the necessary safety measures. The directive continues to require incorporation of a specific AFM supplement to mitigate vertical deviation risks.
Why it matters
This directive is critical for operators and maintenance teams to prevent unsafe vertical deviations during RNP-AR approaches, which could compromise obstacle clearance and missed approach safety margins. Compliance ensures continued airworthiness and operational safety for affected Bombardier BD-700-2A12 aircraft. It also helps avoid mandatory go-arounds caused by descent below the required vertical path guidance.
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