# Proposed AD 96-NM-142-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 97-04-18
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 6, 1996, 61 FR 40760
- Comments due: September 16, 1996
- Became: [AD 97-04-18](https://openairdocs.org/ad/97-04-18)
- Docket: 96-NM-142-AD
- FR document: 96-19892
- Official PDF: https://openairdocs.org/files/sha256/37/3b/373b2ef47e3f5e721dfc1b4177031960774322f6027a6c36a4b57ff07a60d375 (from https://www.govinfo.gov/content/pkg/FR-1996-08-06/pdf/96-19892.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/08/06/96-19892/airworthiness-directives-fokker-model-f27-mark-100-200-300-400-500-600-and-700-series-airplanes
- Page: https://openairdocs.org/proposed/96-NM-142-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Fokker Model F27 Mark 100, 200, 300, 400, 500, 600, and 700 series airplanes. This proposal would require repetitive x-ray inspections to detect cracks in stringers 4 through 7 of the lower skin of the wings, and modification or repair, if necessary. The proposed AD also would require modification of the stringers of the lower skin of the wings, which would terminate the repetitive inspections. This proposal is prompted by reports of fatigue cracking found in stringers 4 through 7 of the lower skin of the wings. The actions specified by the proposed AD are intended to prevent such fatigue cracking, which could result in reduced structural integrity of the wings.

## Notices in this docket

- Aug 6, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-19892, comments due Sep 16, 1996 (https://www.federalregister.gov/documents/1996/08/06/96-19892/airworthiness-directives-fokker-model-f27-mark-100-200-300-400-500-600-and-700-series-airplanes)

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