# Airworthiness Directives; Pilatus Britten-Norman Ltd. Models BN- 2, BN-2A, BN-2B, BN-2T, and BN-2A MK. 111 Series Airplanes
> **Rule** · Final rule. · Published 1997-10-23 · Effective 1997-11-24 · 62 FR 55156
## Document
- **Document number:** 97-27931
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 62 FR 55156
- **Publication date:** 1997-10-23
- **Effective date:** 1997-11-24
- **FAA docket:** Docket No. 84-CE-18-AD
## Abstract

This amendment revises airworthiness directive (AD) 84-23-06, which currently requires repetitively inspecting the upper mounting brackets, bolts, and bushings on wing mounted engines for cracks, wear, and insufficient fit on certain Pilatus Britten-Norman Ltd. (Pilatus) Models BN-2, BN-2A, BN-2B, BN-2T, and BN-2A MK. 111 series airplanes, and replacing any cracked, worn, or ill-fitting part. This action retains the same action required in AD 84-23-06, except the action is only applicable to the BN-2A MK. 111 series airplanes. This action is the result of a terminating modification, now available to the Pilatus Models BN-2, BN-2A, BN-2B, BN-2T airplanes, which removes them from the applicability of AD 84-23-06. The actions specified by this AD are intended to prevent failure of the upper mounting brackets on wing mounted engines, which could possibly cause structural failure of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/10/23/97-27931/airworthiness-directives-pilatus-britten-norman-ltd-models-bn--2-bn-2a-bn-2b-bn-2t-and-bn-2a-mk-111)
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