# Proposed AD FAA-2004-18661: Short Brothers Model SD3-60, SD3-SHERPA, and SD3-60 SHERPA Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-25-13
- Products: Short Brothers
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 22, 2004, 69 FR 43779
- Comments due: August 23, 2004
- Became: [AD 2004-25-13](https://openairdocs.org/ad/2004-25-13)
- Docket: FAA-2004-18661 (https://www.regulations.gov/docket/FAA-2004-18661, where comments are filed)
- Project: 2003-NM-273-AD
- FR document: 04-16682
- Official PDF: https://openairdocs.org/files/sha256/22/ee/22eee8673928d75109491c66eeb5dcf333f9e3fd438a7f30a5504f30b7f32319 (from https://www.govinfo.gov/content/pkg/FR-2004-07-22/pdf/04-16682.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/07/22/04-16682/airworthiness-directives-short-brothers-model-sd3-60-sd3-sherpa-and-sd3-60-sherpa-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6D2711AF5A895A6586256ED900522204.0001
- Page: https://openairdocs.org/proposed/FAA-2004-18661

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for certain Short Brothers Model SD3-60, SD3-SHERPA, and SD3-60 SHERPA series airplanes. That AD currently requires a one-time inspection to detect cracks and/or corrosion of the gland nut on the shock absorber of the main landing gear (MLG), and follow-on actions. That AD also requires repair or replacement of any cracked/corroded gland nut with a new nut. This proposed AD would add airplanes to the applicability; add repetitive inspections and corrective actions; and provide an optional action that would end the repetitive inspections. This proposed AD is prompted by reports of cracked aluminum alloy gland nuts that had been inspected previously using the existing AD. We are proposing this AD to prevent failure of the aluminum alloy gland nut on the MLG shock absorber, which could cause the MLG to collapse.

## Notices in this docket

- Jul 22, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-16682, comments due Aug 23, 2004 (https://www.federalregister.gov/documents/2004/07/22/04-16682/airworthiness-directives-short-brothers-model-sd3-60-sd3-sherpa-and-sd3-60-sherpa-series-airplanes)

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