# Airworthiness Directives; Airbus Model A318-100 and A319-100 Series Airplanes; Model A320-111 Airplanes; and Model A320-200, A321-100, and A321-200 Series Airplanes
> **Rule** · Final rule. · Published 2006-03-31 · Effective 2006-05-05 · 71 FR 16203
## Document
- **Document number:** 06-3062
- **Category:** airworthiness
- **Manufacturer:** Airbus Model A318-100 and A319-100 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 71 FR 16203
- **Publication date:** 2006-03-31
- **Effective date:** 2006-05-05
- **FAA docket:** Docket No. FAA-2005-22794
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus Model A318-100 and A319-100 series airplanes; Model A320-111 airplanes; and Model A320-200, A321-100, and A321-200 series airplanes. This AD requires repetitive detailed inspections of the trimmable horizontal stabilizer actuator (THSA) attachments for proper clearances, and any crack, damage, or metallic particles; related corrective actions if necessary; and a report of the inspection results to the manufacturer. This AD results from a report that during lab testing to verify the performance of the THSA's secondary load path with a simulated failure of the THSA's primary load path, the secondary load path's nut did not jam (as it was supposed to do). We are issuing this AD to ensure the integrity of the THSA's primary load path, which if failed, could result in latent (undetected) loading and eventual failure of the THSA's secondary load path and consequent uncontrolled movement of the horizontal stabilizer and loss of control of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/03/31/06-3062/airworthiness-directives-airbus-model-a318-100-and-a319-100-series-airplanes-model-a320-111)
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