# Proposed AD 84-CE-18-AD: Pilatus Britten-Norman Ltd. BN-2, BN- 2A, BN-2B, BN-2T, and BN-2A Mk 111 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 84-23-06 R1
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 10, 1997, 62 FR 10756
- Comments due: May 12, 1997
- Became: [AD 84-23-06 R1](https://openairdocs.org/ad/84-23-06-R1)
- Docket: 84-CE-18-AD
- FR document: 97-5840
- Official PDF: https://openairdocs.org/files/sha256/a3/16/a31615a55823ed702faf332d5fd0fd690eabd44b60ecb00efd165d1e8f6509ff (from https://www.govinfo.gov/content/pkg/FR-1997-03-10/pdf/97-5840.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/03/10/97-5840/airworthiness-directives-pilatus-britten-norman-ltd-bn-2-bn--2a-bn-2b-bn-2t-and-bn-2a-mk-111-series
- Page: https://openairdocs.org/proposed/84-CE-18-AD

## Summary

This document proposes to revise 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) BN-2, BN-2A, BN- 2B, BN-2T, and BN-2A Mk 111 series airplanes, and replacing any cracked, worn, or ill-fitting part. The proposed action would retain the same action required in AD 84-23-06, except the action would only be applicable to the BN-2A Mk 111 series airplanes. The proposed action is prompted by a terminating modification only applicable to the Pilatus BN-2, BN-2A, BN-2B, BN-2T series airplanes that would remove them from the applicability of AD 84-23-06. The actions specified by the proposed AD are intended to prevent failure of the upper mounting brackets on wing mounted engines which could possibly cause structural failure of the airplane.

## Notices in this docket

- Mar 10, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-5840, comments due May 12, 1997 (https://www.federalregister.gov/documents/1997/03/10/97-5840/airworthiness-directives-pilatus-britten-norman-ltd-bn-2-bn--2a-bn-2b-bn-2t-and-bn-2a-mk-111-series)

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