# Proposed AD 96-NM-199-AD: McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes, and Model MD-88 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-09-19
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 23, 1996, 61 FR 54961
- Comments due: December 2, 1996
- Became: [AD 98-09-19](https://openairdocs.org/ad/98-09-19)
- Docket: 96-NM-199-AD
- FR document: 96-27122
- Official PDF: https://openairdocs.org/files/sha256/cd/4b/cd4ba31aad69a5c8fea4c541faa14bf2bb5624d79a3449fcc4c64ed1e26239da (from https://www.govinfo.gov/content/pkg/FR-1996-10-23/pdf/96-27122.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/10/23/96-27122/airworthiness-directives-mcdonnell-douglas-model-dc-9-dc-9-80-and-c-9-military-series-airplanes-and
- Page: https://openairdocs.org/proposed/96-NM-199-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-9, DC-9-80, and C-9 (military) series airplanes, and Model MD-88 airplanes. This proposal would require modification of certain non- regulating shutoff valves on the engine starter. This proposal is prompted by reports of uncontained failures of engine starters during flight and maintenance, which resulted from the application of excessive pressure on the engine starter that was associated with the installation of non-regulating shutoff valves on the starter. The actions specified by the proposed AD are intended to prevent such uncontained failures of the engine starters, which could create a fire hazard in the engine nacelle.

## Notices in this docket

- Oct 23, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-27122, comments due Dec 2, 1996 (https://www.federalregister.gov/documents/1996/10/23/96-27122/airworthiness-directives-mcdonnell-douglas-model-dc-9-dc-9-80-and-c-9-military-series-airplanes-and)

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