# Proposed AD 99-NM-51-AD: Saab Model SAAB SF340A and SAAB 340B Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-12-07
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 5, 2000, 65 FR 395
- Comments due: February 4, 2000
- Became: [AD 2000-12-07](https://openairdocs.org/ad/2000-12-07)
- Docket: 99-NM-51-AD
- FR document: 00-138
- Official PDF: https://openairdocs.org/files/sha256/1f/ff/1fffd579ed1974fe6cfcd770cf0ee222abfaefd11fafc295110bacc9c320e843 (from https://www.govinfo.gov/content/pkg/FR-2000-01-05/pdf/00-138.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/01/05/00-138/airworthiness-directives-saab-model-saab-sf340a-and-saab-340b-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-51-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Saab Model SAAB SF340A and SAAB 340B series airplanes. This proposal would require a one-time inspection to detect corrosion and scratches on the bearing housing surfaces of the support assembly on the main landing gear (MLG), and corrective actions, if necessary. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent corrosion in the inboard and outboard bearing housings of the MLG support assembly, which could result in fatigue cracks in the support assembly and lead to failure of the MLG.

## Notices in this docket

- Jan 5, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-138, comments due Feb 4, 2000 (https://www.federalregister.gov/documents/2000/01/05/00-138/airworthiness-directives-saab-model-saab-sf340a-and-saab-340b-series-airplanes)

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