# Airworthiness Directives; Various Aircraft Equipped with Wing Lift Struts
> **Rule** · Final rule. · Published 2013-12-10 · Effective 2014-01-14 · 78 FR 73997
## Document
- **Document number:** 2013-29396
- **Category:** airworthiness
- **Manufacturer:** Various
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 73997
- **Publication date:** 2013-12-10
- **Effective date:** 2014-01-14
- **FAA docket:** Docket No. FAA-2013-0023
## Abstract

We are revising Airworthiness Directive (AD) 99-01-05 for certain aircraft equipped with wing lift struts. AD 99-01-05 required repetitively inspecting the wing lift struts for corrosion; repetitively inspecting the wing lift strut forks for cracks; replacing any corroded wing lift strut; replacing any cracked wing lift strut fork; and repetitively replacing the wing lift strut forks at a specified time for certain airplanes. AD 99-01-05 also required incorporating a "NO STEP" placard on the wing lift strut. Since we issued AD 99-01-05, we were informed that paragraph (c) had been misinterpreted and caused confusion. This AD clarifies the intent of the language in paragraph (c) of AD 99-01-05 and retains all other requirements of AD 99-01-05. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/12/10/2013-29396/airworthiness-directives-various-aircraft-equipped-with-wing-lift-struts)
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