# Proposed AD 2000-NM-144-AD: Gulfstream Model G-1159A (G-III) Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-26-20
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 12, 2000, 65 FR 60593
- Comments due: November 27, 2000
- Became: [AD 2000-26-20](https://openairdocs.org/ad/2000-26-20)
- Docket: 2000-NM-144-AD
- FR document: 00-26094
- Official PDF: https://openairdocs.org/files/sha256/57/5e/575eedeccf019bf273f01dab37d97aeaf42f5acdc9f8a53f17b58f3a1526dbfb (from https://www.govinfo.gov/content/pkg/FR-2000-10-12/pdf/00-26094.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/10/12/00-26094/airworthiness-directives-gulfstream-model-g-1159a-g-iii-series-airplanes
- Page: https://openairdocs.org/proposed/2000-NM-144-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Gulfstream Model G-1159A (G-III) series airplanes. This proposal would require modification of the master caution panel by installing an additional legend labeled "BATT ON BUS" and associated wiring to indicate when the airplane batteries are powering the direct current (DC) essential bus. This action is necessary to ensure that the flight crew is aware that an electrical system failure has occurred and that the main airplane batteries are powering the essential DC bus. If the flight crew is unaware of this situation, action to stop the depletion of the airplane batteries will not be taken and critical equipment, such as communications and navigation equipment, could fail. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Oct 12, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-26094, comments due Nov 27, 2000 (https://www.federalregister.gov/documents/2000/10/12/00-26094/airworthiness-directives-gulfstream-model-g-1159a-g-iii-series-airplanes)

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