# Proposed AD FAA-2021-0576: Pacific Aerospace Limited Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-20-20
- Products: Pacific Aerospace
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 22, 2021, 86 FR 38615
- Comments due: September 7, 2021
- Became: [AD 2021-20-20](https://openairdocs.org/ad/2021-20-20)
- Docket: FAA-2021-0576 (https://www.regulations.gov/docket/FAA-2021-0576, where comments are filed)
- Project: 2019-CE-008-AD
- FR document: 2021-15474
- Official PDF: https://openairdocs.org/files/sha256/d1/54/d154e997cfae865d2e1573aa3a5756077cd509746f64400bc7cb4c4564a25d72 (from https://www.govinfo.gov/content/pkg/FR-2021-07-22/pdf/2021-15474.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/07/22/2021-15474/airworthiness-directives-pacific-aerospace-limited-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3D6B11D48F8ADAB28625871A007D2B9C.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0576

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pacific Aerospace Limited Model 750XL airplanes. This proposed AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as installation of the wing leading edge tank fuel pickup assembly in a pre-stressed condition, which could cause cracks in the wing spar web or the fuel pickup assembly pipe. This proposed AD would require inspecting the angle of the support bracket on the wing leading edge tank fuel pickup assembly and taking any necessary corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jul 22, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-15474, comments due Sep 7, 2021 (https://www.federalregister.gov/documents/2021/07/22/2021-15474/airworthiness-directives-pacific-aerospace-limited-airplanes)

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