# Proposed AD 99-NM-14-AD: McDonnell Douglas Model DC-10-10, -15, and -30 Airplanes, and KC-10A (Military) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-04-07 R2
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 21, 1999, 64 FR 39104
- Comments due: September 7, 1999
- Became: [AD 95-04-07 R2](https://openairdocs.org/ad/95-04-07-R2)
- Docket: 99-NM-14-AD
- FR document: 99-18629
- Official PDF: https://openairdocs.org/files/sha256/c9/6b/c96b66243334b1f60c504d255a27cd8558f8f09051cfec0b66834d74abb3df07 (from https://www.govinfo.gov/content/pkg/FR-1999-07-21/pdf/99-18629.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/07/21/99-18629/airworthiness-directives-mcdonnell-douglas-model-dc-10-10--15-and--30-airplanes-and-kc-10a-military
- Page: https://openairdocs.org/proposed/99-NM-14-AD

## Summary

This document proposes to revise an existing airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-10-10, -15, and -30 airplanes and KC-10A (military) airplanes, that currently requires inspections to determine the condition of the lockwires on the forward engine mount bolts and correction of any discrepancies found. That action also provides for termination of the inspections for some airplanes by installing retainers on the bolts. That AD was prompted by reports of stretched or broken lockwires on the forward engine mount bolts. The actions specified by that AD are intended to prevent broken lockwires, which could result in loosening of the engine mount bolts, and subsequent separation of the engine from the airplane. This new action would provide an additional optional terminating modification, clarification of the requirements of the previous optional terminating modification, and would remove the reporting requirements for the repetitive inspections.

## Notices in this docket

- Jul 21, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-18629, comments due Sep 7, 1999 (https://www.federalregister.gov/documents/1999/07/21/99-18629/airworthiness-directives-mcdonnell-douglas-model-dc-10-10--15-and--30-airplanes-and-kc-10a-military)

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