# Airworthiness Directives; Short Brothers Model SD3-60 and SD3-60 SHERPA Series Airplanes
> **Rule** · Final rule. · Published 1999-03-12 · Effective 1999-04-16 · 64 FR 12247
## Document
- **Document number:** 99-5991
- **Category:** airworthiness
- **Manufacturer:** Short Brothers Model SD3-60 and SD3-60 SHERPA Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 12247
- **Publication date:** 1999-03-12
- **Effective date:** 1999-04-16
- **FAA docket:** Docket No. 97-NM-106-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all Short Brothers Model SD3-60 and SD3-60 SHERPA series airplanes, that requires 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. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/03/12/99-5991/airworthiness-directives-short-brothers-model-sd3-60-and-sd3-60-sherpa-series-airplanes)
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