# Proposed AD 98-NM-55-AD: McDonnell Douglas Model DC-10 and MD-11 Series Airplanes, and KC-10 (Military) Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-06-08
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 27, 1998, 63 FR 14851
- Comments due: May 11, 1998
- Became: [AD 99-06-08](https://openairdocs.org/ad/99-06-08)
- Docket: 98-NM-55-AD
- FR document: 98-8099
- Official PDF: https://openairdocs.org/files/sha256/e2/d6/e2d602b13f2fa71a7db635daf8da5f0990a2295f342db1f954b3dad727e4730c (from https://www.govinfo.gov/content/pkg/FR-1998-03-27/pdf/98-8099.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/03/27/98-8099/airworthiness-directives-mcdonnell-douglas-model-dc-10-and-md-11-series-airplanes-and-kc-10-military
- Page: https://openairdocs.org/proposed/98-NM-55-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model DC-10 and MD-11 series airplanes, and KC-10 (military) series airplanes. This proposal would require a one-time inspection for blockage of the lubrication holes on the forward trunnion spacer assembly, and a one-time inspection of the forward trunnion bolt on the left and right main landing gear (MLG) to detect discrepancies; and repair, if necessary. This proposal is prompted by reports of blockage by opposing bushings of the lubrication holes on the forward trunnion spacer assembly, and reports of flaking, galling, and corrosion of the forward trunnion bolt. The actions specified by the proposed AD are intended to detect and correct such flaking, galling, and corrosion of the forward trunnion bolt, which could result in premature failure of the forward trunnion bolt and could lead to separation of the MLG from the wing during takeoff and landing.

## Notices in this docket

- Mar 27, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-8099, comments due May 11, 1998 (https://www.federalregister.gov/documents/1998/03/27/98-8099/airworthiness-directives-mcdonnell-douglas-model-dc-10-and-md-11-series-airplanes-and-kc-10-military)

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