# Proposed AD FAA-2020-0971: 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 2021-05-10
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 28, 2020, 85 FR 68257
- Comments due: December 14, 2020
- Became: [AD 2021-05-10](https://openairdocs.org/ad/2021-05-10)
- Docket: FAA-2020-0971 (https://www.regulations.gov/docket/FAA-2020-0971, where comments are filed)
- FR document: 2020-23742
- Official PDF: https://openairdocs.org/files/sha256/93/46/934685cfe9256d274b5d01905a58a7b392c8635a8576b389b75944de0406f292 (from https://www.govinfo.gov/content/pkg/FR-2020-10-28/pdf/2020-23742.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/10/28/2020-23742/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D16D4BB873E6AC758625860F0057064D.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0971

## 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 threaded fuel couplings were incorrectly installed at final assembly and in service. This proposed AD would require repetitive functional tests of the auxiliary power unit (APU) fuel feed line shroud, a general visual inspection of the APU feed line shroud for any loose couplings; and tightening any loose couplings, which would terminate the repetitive functional tests. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 28, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-23742, comments due Dec 14, 2020 (https://www.federalregister.gov/documents/2020/10/28/2020-23742/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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