# Proposed AD FAA-2024-2543: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-04-11
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 27, 2024, 89 FR 93528
- Comments due: January 13, 2025
- Became: [AD 2025-04-11](https://openairdocs.org/ad/2025-04-11)
- Docket: FAA-2024-2543 (https://www.regulations.gov/docket/FAA-2024-2543, where comments are filed)
- Project: MCAI-2024-00342-T
- FR document: 2024-27784
- Official PDF: https://openairdocs.org/files/sha256/69/c4/69c4525ef9e9e510130a82b9760ca44a00e2437dffe3297ae24b92d94248e3db (from https://www.govinfo.gov/content/pkg/FR-2024-11-27/pdf/2024-27784.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/11/27/2024-27784/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-27784-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2543

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-700-2A12 airplanes. This proposed AD was prompted by the discovery that a partial loss of thrust after an engine failure during a required navigation performance authorization required (RNP-AR) approach under certain weight, altitude and temperature (WAT) conditions, may lead to a descent below the specified path guidance. This proposed AD would require a revision to the existing airplane flight manual (AFM), to incorporate updated WAT tables for RNP-AR approach operations. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 27, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-27784, comments due Jan 13, 2025 (https://www.federalregister.gov/documents/2024/11/27/2024-27784/airworthiness-directives-bombardier-inc-airplanes)

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