# Proposed AD FAA-2024-2720: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-07-11
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 6, 2025, 90 FR 578
- Comments due: February 20, 2025
- Became: [AD 2025-07-11](https://openairdocs.org/ad/2025-07-11)
- Docket: FAA-2024-2720 (https://www.regulations.gov/docket/FAA-2024-2720, where comments are filed)
- Project: MCAI-2024-00129-T
- FR document: 2024-31624
- Official PDF: https://openairdocs.org/files/sha256/fc/cf/fccfa0717dcd0a502d85aba2b816670e36cc1338118d4e833ba8c48ff1c0bdf4 (from https://www.govinfo.gov/content/pkg/FR-2025-01-06/pdf/2024-31624.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/01/06/2024-31624/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-31624-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2720

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This proposed AD was prompted by reports of engine-driven pump hydraulic pressure hoses for hydraulic systems number 1 and 2 chafing against the pylon in the aft equipment bay. This proposed AD would require an inspection of the engine-driven pump pressure hoses for any damage and minimum clearance between the engine-driven pump hydraulic pressure hose and case drain, suction pressure hose, and surrounding pylon structure; and corrective actions if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jan 6, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-31624, comments due Feb 20, 2025 (https://www.federalregister.gov/documents/2025/01/06/2024-31624/airworthiness-directives-bombardier-inc-airplanes)

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