# Proposed AD 98-NM-98-AD: Fokker Model F27 Mark 100, 200, 300, 400, 500, 600, and 700 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-12-35
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 15, 1998, 63 FR 18342
- Comments due: May 15, 1998
- Became: [AD 98-12-35](https://openairdocs.org/ad/98-12-35)
- Docket: 98-NM-98-AD
- FR document: 98-9875
- Official PDF: https://openairdocs.org/files/sha256/ba/ea/baea428d7e3cf5ef72ddcfd857af52972845333bacbad39b9f71049fb22932c1 (from https://www.govinfo.gov/content/pkg/FR-1998-04-15/pdf/98-9875.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/04/15/98-9875/airworthiness-directives-fokker-model-f27-mark-100-200-300-400-500-600-and-700-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-98-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Fokker Model F27 Mark 100, 200, 300, 400, 500, 600, and 700 series airplanes. This proposal would require replacement of the actuating ram bobbin and O-ring seals of the main landing gear (MLG), with new bobbins and improved O-ring seals. 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 loss of dampening of the MLG actuating ram, which could result in failure of the MLG lockstruts, and consequent structural damage to the airplane.

## Notices in this docket

- Apr 15, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-9875, comments due May 15, 1998 (https://www.federalregister.gov/documents/1998/04/15/98-9875/airworthiness-directives-fokker-model-f27-mark-100-200-300-400-500-600-and-700-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.