# Proposed AD FAA-2024-0464: 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 2024-22-04
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 11, 2024, 89 FR 17343
- Comments due: April 25, 2024
- Became: [AD 2024-22-04](https://openairdocs.org/ad/2024-22-04)
- Docket: FAA-2024-0464 (https://www.regulations.gov/docket/FAA-2024-0464, where comments are filed)
- Project: MCAI-2022-01556-T
- FR document: 2024-04955
- Official PDF: https://openairdocs.org/files/sha256/9d/04/9d0428f3a0fdcb84127398c82671a767ba60242f5c8c4c8144f6d5904ca1ddec (from https://www.govinfo.gov/content/pkg/FR-2024-03-11/pdf/2024-04955.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/03/11/2024-04955/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-04955-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-0464

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2021-09-03, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2021-09-03 requires repetitive replacements of the emergency locator transmitter (ELT) antenna and repetitive inspections of the exterior fuselage skin around the ELT antenna attachment area. Since the FAA issued AD 2021-09-03, it has been reported that there was an in-service failure of an ELT antenna that occurred before the repetitive replacement interval required by AD 2021-09-03, and that a terminating action was developed. This proposed AD would continue to require the actions in AD 2021-09-03 and would require replacement of the ELT antenna with a new ELT antenna, inspection of the exterior fuselage skin around the ELT antenna attachment holes, and repair 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

- Mar 11, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-04955, comments due Apr 25, 2024 (https://www.federalregister.gov/documents/2024/03/11/2024-04955/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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