# Proposed AD 98-NM-351-AD: Boeing Model 737-300, -400, and -500 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-02-03
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 19, 1999, 64 FR 45211
- Comments due: October 4, 1999
- Became: [AD 2000-02-03](https://openairdocs.org/ad/2000-02-03)
- Docket: 98-NM-351-AD
- FR document: 99-21575
- Official PDF: https://openairdocs.org/files/sha256/de/d2/ded2625cf240bc8ade62bbf7247688258cae7a819b953a94940f55455cdaaf93 (from https://www.govinfo.gov/content/pkg/FR-1999-08-19/pdf/99-21575.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/08/19/99-21575/airworthiness-directives-boeing-model-737-300--400-and--500-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-351-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Boeing Model 737-300, -400 and -500 series airplanes. This proposal would require replacement, with new parts, of the existing actuators or the rod ends on the existing actuators at wing leading edge slat positions 1, 2, 5, and 6. This proposal is prompted by reports indicating that the rod ends on several leading edge slat actuators have fractured. The actions specified by the proposed AD are intended to prevent fatigue cracking of the rod ends of the leading edge slat actuators, which could result in uncommanded deployment of the wing leading edge slat and consequent reduced controllability of the airplane.

## Notices in this docket

- Aug 19, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-21575, comments due Oct 4, 1999 (https://www.federalregister.gov/documents/1999/08/19/99-21575/airworthiness-directives-boeing-model-737-300--400-and--500-series-airplanes)

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