# Proposed AD FAA-2023-1709: Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-04-06
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 14, 2023, 88 FR 54949
- Comments due: September 28, 2023
- Became: [AD 2024-04-06](https://openairdocs.org/ad/2024-04-06)
- Docket: FAA-2023-1709 (https://www.regulations.gov/docket/FAA-2023-1709, where comments are filed)
- Project: MCAI-2022-01642-T
- FR document: 2023-17017
- Official PDF: https://openairdocs.org/files/sha256/64/65/646520f1e3b9816584a174b6fec9fc2c7071da5a50c308e2814658c14ff7ed81 (from https://www.govinfo.gov/content/pkg/FR-2023-08-14/pdf/2023-17017.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/08/14/2023-17017/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-17017-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-1709

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD- 500-1A11 airplanes. This proposed AD was prompted by reports of mechanical wear damage on the motive flow fuel-feed tubes that were secured by bonding clamps and clamp blocks inside the collector tank. This proposed AD would require repetitive operational checks of the gravity cross flow shut-off valve and, for certain airplanes, a one- time inspection of the motive flow fuel-feed tubes at the clamp blocks location, and corrective action if necessary, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 14, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-17017, comments due Sep 28, 2023 (https://www.federalregister.gov/documents/2023/08/14/2023-17017/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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