# Proposed AD 97-NM-140-AD: Raytheon Model Hawker 1000 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-26-10
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 1, 1997, 62 FR 51385
- Comments due: October 27, 1997
- Became: [AD 97-26-10](https://openairdocs.org/ad/97-26-10)
- Docket: 97-NM-140-AD
- FR document: 97-25975
- Official PDF: https://openairdocs.org/files/sha256/c1/4a/c14a2426514f864540fa83ff3e117bf06a39f9a3a0c4190638a773b5216d09a4 (from https://www.govinfo.gov/content/pkg/FR-1997-10-01/pdf/97-25975.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/10/01/97-25975/airworthiness-directives-raytheon-model-hawker-1000-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-140-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Raytheon Model Hawker 1000 series airplanes. This proposal would require modifying the aft core cowl nozzles of the engine nacelles. This proposal is prompted by a report indicating that the sealant on the core cowl nozzles may extend higher than the forward flange of the core cowl nozzles, which could result in contact between the cowl sealant surface and the lever of the engine mechanical over-speed control system. The actions specified by the proposed AD are intended to prevent such contact, which could cause result in the over-speed system to function improperly and consequent engine structural failure.

## Notices in this docket

- Oct 1, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-25975, comments due Oct 27, 1997 (https://www.federalregister.gov/documents/1997/10/01/97-25975/airworthiness-directives-raytheon-model-hawker-1000-series-airplanes)

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