# Airworthiness Directives; Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Airplanes
> **Rule** · Final rule; request for comments. · Published 2015-09-02 · Effective 2015-09-17 · 80 FR 52941
## Document
- **Document number:** 2015-21465
- **Category:** airworthiness
- **Manufacturer:** Lockheed Martin Corporation/Lockheed Martin Aeronautics Company
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 80 FR 52941
- **Publication date:** 2015-09-02
- **Effective date:** 2015-09-17
- **FAA docket:** Docket No. FAA-2014-0779
## Abstract

We are adopting a new airworthiness directive (AD) for all Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Model 382, 382B, 382E, 382F, and 382G airplanes. This AD requires replacing the center wing box (CWB) and certain outer wings. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the CWB and outer wings are subject to widespread fatigue damage (WFD). We are issuing this AD to prevent fatigue cracking of the outer wings and the lower surface of the CWB, which could result in reduced structural integrity of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/09/02/2015-21465/airworthiness-directives-lockheed-martin-corporationlockheed-martin-aeronautics-company-airplanes)
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