# Airworthiness Directives; McDonnell Douglas Model DC-9-10, -20, -30, and -40 Series Airplanes and C-9 Airplanes
> **Rule** · Final rule; correction. · Published 2002-01-04 · Effective 2002-01-16 · 67 FR 499
## Document
- **Document number:** 02-86
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 67 FR 499
- **Publication date:** 2002-01-04
- **Effective date:** 2002-01-16
- **FAA docket:** Docket No. 2001-NM-104-AD
## Abstract

This document corrects information in an existing airworthiness directive (AD) that applies to certain McDonnell Douglas Model DC-9-10, -20, -30, and -40 series airplanes and C-9 airplanes. That AD currently requires modification of the spoiler control system, and installation of protective interlock box assemblies in the spoiler circuit. This document corrects the affected models specified in the "Applicability" of the AD. This correction is necessary to ensure that the appropriate affected airplane models are identified correctly.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/01/04/02-86/airworthiness-directives-mcdonnell-douglas-model-dc-9-10--20--30-and--40-series-airplanes-and-c-9)
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