# Airworthiness Directives; Israel Aircraft Industries (IAI), Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
> **Rule** · Final rule. · Published 1998-03-06 · Effective 1998-04-10 · 63 FR 11106
## Document
- **Document number:** 98-5348
- **Category:** airworthiness
- **Manufacturer:** Israel
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 11106
- **Publication date:** 1998-03-06
- **Effective date:** 1998-04-10
- **FAA docket:** Docket No. 97-NM-166-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all IAI, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A series airplanes, that requires repetitive inspections of the trim actuator of the horizontal stabilizer to verify jackscrew integrity and to detect excessive wear of the tie rod, and replacement of the actuator or tie rod, if necessary. This amendment is prompted by issuance of mandatory continued airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to ensure that the trim actuator of the horizontal stabilizer operates properly; failure of the actuator to operate properly could result in reduced controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/06/98-5348/airworthiness-directives-israel-aircraft-industries-iai-ltd-model-1121-1121a-1121b-1123-1124-and)
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