# Proposed AD FAA-2021-0604: Pacific Aerospace Limited Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-21-11
- Products: Pacific Aerospace
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 28, 2021, 86 FR 40381
- Comments due: September 13, 2021
- Became: [AD 2021-21-11](https://openairdocs.org/ad/2021-21-11)
- Docket: FAA-2021-0604 (https://www.regulations.gov/docket/FAA-2021-0604, where comments are filed)
- Project: 2019-CE-007-AD
- FR document: 2021-15951
- Official PDF: https://openairdocs.org/files/sha256/48/20/48204d54f5e512e61452e2fd33e9b74d17702c98eb127b84c1e5ab8addf038f9 (from https://www.govinfo.gov/content/pkg/FR-2021-07-28/pdf/2021-15951.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/07/28/2021-15951/airworthiness-directives-pacific-aerospace-limited-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5D11062D3042AC458625872100791E36.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0604

## 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 identifies the unsafe condition as insufficient clearance between the engine mount, the Beta control rod, and the inter-turbine temperature (ITT) sensing probe that could lead to chafing damage. This proposed AD would require inspecting the engine mount, the temperature probe, and the reversing cable for damage, 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 28, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-15951, comments due Sep 13, 2021 (https://www.federalregister.gov/documents/2021/07/28/2021-15951/airworthiness-directives-pacific-aerospace-limited-airplanes)

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