# Airworthiness Directives; British Aerospace (Jetstream) Model 4100 Series Airplanes
> **Rule** · Final rule. · Published 1998-08-19 · Effective 1998-09-23 · 63 FR 44371
## Document
- **Document number:** 98-21992
- **Category:** airworthiness
- **Manufacturer:** British Aerospace (Jetstream) Model 4100 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 44371
- **Publication date:** 1998-08-19
- **Effective date:** 1998-09-23
- **FAA docket:** Docket No. 98-NM-86-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain British Aerospace (Jetstream) Model 4100 series airplanes, that requires an eddy current conductivity test to measure the conductivity of the upper splice plate of the wing, and follow-on actions, 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 correct corrosion of the upper splice plate of the wing, which could result in reduced structural integrity of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/08/19/98-21992/airworthiness-directives-british-aerospace-jetstream-model-4100-series-airplanes)
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