# Proposed AD FAA-2014-0749: Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-05-08
- Products: Lockheed Martin
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 16, 2014, 79 FR 62075
- Comments due: December 1, 2014
- Became: [AD 2015-05-08](https://openairdocs.org/ad/2015-05-08)
- Docket: FAA-2014-0749 (https://www.regulations.gov/docket/FAA-2014-0749, where comments are filed)
- Project: 2014-NM-051-AD
- FR document: 2014-24549
- Official PDF: https://openairdocs.org/files/sha256/50/83/50831994b4b9c3c74a362c30571f9b8f3e53ce5de640a4db605816b4bda41fd3 (from https://www.govinfo.gov/content/pkg/FR-2014-10-16/pdf/2014-24549.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/10/16/2014-24549/airworthiness-directives-lockheed-martin-corporationlockheed-martin-aeronautics-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/35CA24AFFB7B8D0F86257D73004CEFD2.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0749

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Lockheed Martin Corporation/Lockheed Martin Aeronautics Company Model 382, 382B, 382E, 382F, and 382G airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the upper and lower rainbow fittings on the outer wing are subject to widespread fatigue damage (WFD). This proposed AD would require repetitive inspections of the upper and lower rainbow fittings on the outer wing to detect cracks propagating from fasteners attaching the fittings to skin panels, and related investigative and corrective actions if necessary; and replacement of the upper and lower rainbow fittings on the outer wing. We are proposing this AD to prevent fatigue cracking of the upper and lower rainbow fittings on the outer wing and skin-panel-to-fitting fastener holes, which could result in reduced structural integrity of the airplane and possible separation of the wing from the airplane.

## Notices in this docket

- Oct 16, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-24549, comments due Dec 1, 2014 (https://www.federalregister.gov/documents/2014/10/16/2014-24549/airworthiness-directives-lockheed-martin-corporationlockheed-martin-aeronautics-company-airplanes)

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