# Proposed AD 97-NM-106-AD: Short Brothers Model SD3-60 and SD3-60 SHERPA Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-06-07
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: July 24, 1998, 63 FR 39769
- Comments due: August 18, 1998
- Became: [AD 99-06-07](https://openairdocs.org/ad/99-06-07)
- Docket: 97-NM-106-AD
- FR document: 98-19778
- Official PDF: https://openairdocs.org/files/sha256/9e/53/9e538259046159c902c3e1903b7bb7acffa85cab10379e11ab35d4e00a295c60 (from https://www.govinfo.gov/content/pkg/FR-1998-07-24/pdf/98-19778.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/07/24/98-19778/airworthiness-directives-short-brothers-model-sd3-60-and-sd3-60-sherpa-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-106-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to all Short Brothers Model SD3-60 series airplanes, that would have required repetitive inspections to detect corrosion and/or wear of the top and bottom shear decks of the left and right stub wings in the area of the forward pintle pin of the main landing gear (MLG), and repair, if necessary. That proposal was prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. This new action revises the proposed rule by expanding the applicability to include an additional airplane model. The actions specified by this new proposed AD are intended to detect and correct corrosion and/or wear of the top and bottom shear decks of the left and right stub wings in the area of the forward pintle pin of the MLG, which could result in failure of the MLG to extend or retract.

## Notices in this docket

- Oct 6, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-26377, comments due Nov 5, 1997 (https://www.federalregister.gov/documents/1997/10/06/97-26377/airworthiness-directives-short-brothers-model-sd3-60-series-airplanes)
- Jul 24, 1998: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 98-19778, comments due Aug 18, 1998 (https://www.federalregister.gov/documents/1998/07/24/98-19778/airworthiness-directives-short-brothers-model-sd3-60-and-sd3-60-sherpa-series-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.