# Proposed AD FAA-2005-22875: Short Brothers Model SD3-60 SHERPA, SD3-SHERPA, and SD3-60 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-03-05
- Products: Short Brothers
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 9, 2005, 70 FR 67949
- Comments due: December 9, 2005
- Became: [AD 2006-03-05](https://openairdocs.org/ad/2006-03-05)
- Docket: FAA-2005-22875 (https://www.regulations.gov/docket/FAA-2005-22875, where comments are filed)
- Project: 2005-NM-179-AD
- FR document: 05-22305
- Official PDF: https://openairdocs.org/files/sha256/9d/26/9d269bed9a8067989dd1c6aed040c802572b73e114fee3608c0305c15ba89994 (from https://www.govinfo.gov/content/pkg/FR-2005-11-09/pdf/05-22305.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/11/09/05-22305/airworthiness-directives-short-brothers-model-sd3-60-sherpa-sd3-sherpa-and-sd3-60-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/970952843F4D5004862570B400618D11.0001
- Page: https://openairdocs.org/proposed/FAA-2005-22875

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all Short Brothers Model SD3-60 and SD3- SHERPA airplanes. The existing AD currently requires an inspection of the fork end of the rear pintle pin on each main landing gear (MLG) to verify that sealant is properly applied and is undamaged, and related investigative/corrective actions if necessary. This proposed AD would add an inspection for correctly applied sealant on the MLG rear pintle pin assemblies, and related investigative/corrective actions if necessary. This proposed AD would also expand the applicability of the existing AD. This proposed AD results from a new report of a cracked pintle pin fork end. We are proposing this AD to prevent stress- corrosion cracking and subsequent failure of the MLG.

## Notices in this docket

- Nov 9, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-22305, comments due Dec 9, 2005 (https://www.federalregister.gov/documents/2005/11/09/05-22305/airworthiness-directives-short-brothers-model-sd3-60-sherpa-sd3-sherpa-and-sd3-60-airplanes)

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