# Proposed AD 95-NM-25-AD: Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-19-04
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 16, 1995, 60 FR 26003
- Comments due: June 26, 1995
- Became: [AD 95-19-04](https://openairdocs.org/ad/95-19-04)
- Docket: 95-NM-25-AD
- FR document: 95-11975
- Official PDF: https://openairdocs.org/files/sha256/73/d5/73d51d68874cc3007b7942ca281086788d4cd451970eee19fd81dbe7f75b98c2 (from https://www.govinfo.gov/content/pkg/FR-1995-05-16/pdf/95-11975.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/05/16/95-11975/airworthiness-directives-learjet-model-35-35a-36-36a-55-55b-and-55c-airplanes
- Page: https://openairdocs.org/proposed/95-NM-25-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Learjet Model 35, 35A, 36, 36A, 55, 55B, and 55C airplanes. This proposal would require installation of a placard on the instrument panel in the cockpit to advise the flightcrew that the Omega navigation system may be inoperative at certain engine speeds. This proposal is prompted by reports of loss of certain navigation signals during extended over water operation. The actions specified by the proposed AD are intended to prevent excessive deviation from the intended flight path due to loss of navigation signals, which could result in a potentially low- fuel condition or a traffic conflict.

## Notices in this docket

- May 16, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-11975, comments due Jun 26, 1995 (https://www.federalregister.gov/documents/1995/05/16/95-11975/airworthiness-directives-learjet-model-35-35a-36-36a-55-55b-and-55c-airplanes)

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