# Proposed AD FAA-2021-0260: 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 2021-20-07
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 26, 2021, 86 FR 21969
- Comments due: June 10, 2021
- Became: [AD 2021-20-07](https://openairdocs.org/ad/2021-20-07)
- Docket: FAA-2021-0260 (https://www.regulations.gov/docket/FAA-2021-0260, where comments are filed)
- Project: MCAI-2020-01255-T
- FR document: 2021-08622
- Official PDF: https://openairdocs.org/files/sha256/87/5f/875f278e8a4cad11209e31836290ef4f544c7d31f4d1a97c2c80924b6cdb77b2 (from https://www.govinfo.gov/content/pkg/FR-2021-04-26/pdf/2021-08622.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/04/26/2021-08622/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6765A6297E4AF774862586C3006E306F.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0260

## 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 a report that following an in-service engine shutdown during taxi, water was found to be dripping into the forward avionics bay; the water caused a short circuit and tripped a circuit breaker. This proposed AD would require replacing the forward galley slotted drain covers with solid blanking plates and modifying the associated drain tubing to block water. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Apr 26, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-08622, comments due Jun 10, 2021 (https://www.federalregister.gov/documents/2021/04/26/2021-08622/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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