# Proposed AD FAA-2005-22018: Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-22-04
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 22, 2005, 70 FR 48914
- Comments due: September 23, 2005
- Became: [AD 2005-22-04](https://openairdocs.org/ad/2005-22-04)
- Docket: FAA-2005-22018 (https://www.regulations.gov/docket/FAA-2005-22018, where comments are filed)
- Project: 2005-CE-41-AD
- FR document: 05-16528
- Official PDF: https://openairdocs.org/files/sha256/c8/73/c8733938fef61d54ed928034200932279274aa79a6bb762ae479b126f9949422 (from https://www.govinfo.gov/content/pkg/FR-2005-08-22/pdf/05-16528.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/08/22/05-16528/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C04DFB127F023096862570650066CA36.0001
- Page: https://openairdocs.org/proposed/FAA-2005-22018

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC-12/45 airplanes. This proposed AD would require you to determine (maintenance records check and/or inspection) whether certain nose landing gear (NLG), main landing gear (MLG), and MLG shock absorber assemblies with a serial number beginning with "AM" are installed, and, if installed, would require you to replace them with ones without the "AM." This proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. We are issuing this proposed AD to detect and correct the NLG, MLG, and MLG shock absorber assemblies that are affected by hydrogen embrittlement, which could result in failure of the landing gear. This failure could lead to nose or main landing gear collapse during operation with consequent loss of airplane control.

## Notices in this docket

- Aug 22, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-16528, comments due Sep 23, 2005 (https://www.federalregister.gov/documents/2005/08/22/05-16528/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes)

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