# Airworthiness Directives; Learjet Inc.
> **Rule** · Final rule. · Published 2012-04-24 · Effective 2012-05-29 · 77 FR 24344
## Document
- **Document number:** 2012-9393
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 24344
- **Publication date:** 2012-04-24
- **Effective date:** 2012-05-29
- **FAA docket:** Docket No. FAA-2011-1069
## Abstract

We are adopting a new airworthiness directive (AD) for all Learjet Inc., Model 45 airplanes. This AD was prompted by changes to the Airworthiness Limitations Section (ALS) of the maintenance manual, which adds life-limits, revises life-limits, or adds inspections not previously identified. This AD requires revising the maintenance program to include new or more restrictive life-limits and inspections. We are issuing this AD to limit exposure of flight critical components to corrosion, cracking, or failure due to life-limits, which if not corrected, could result in loss of roll control, fatigue cracking, or loss of structural components.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/04/24/2012-9393/airworthiness-directives-learjet-inc)
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