# Airworthiness Directives; McDonnell Douglas Model DC-9-81, -9-82, -9-83, and -9-87 Series Airplanes; Model MD-88 Airplanes; and Model MD-90-30 Series Airplanes
> **Rule** · Final rule. · Published 2001-11-13 · Effective 2001-12-18 · 66 FR 56753
## Document
- **Document number:** 01-28023
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 66 FR 56753
- **Publication date:** 2001-11-13
- **Effective date:** 2001-12-18
- **FAA docket:** Docket No. 2000-NM-260-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-81, -9-82, -9-83, and -9-87 series airplanes; Model MD-88 airplanes; and Model MD-90-30 series airplanes. This action requires repetitive inspections of the electric motors (or motors) of the auxiliary hydraulic pump for electrical resistance, continuity, mechanical rotation, and associated wiring resistance/voltage; and corrective actions, if necessary. The actions specified by this AD are intended to prevent various failures of the electric motor(s) of the auxiliary hydraulic pump and associated wiring, which could result in fire at the auxiliary hydraulic pump and consequent damage to the adjacent electrical equipment and/or structure. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/11/13/01-28023/airworthiness-directives-mcdonnell-douglas-model-dc-9-81--9-82--9-83-and--9-87-series-airplanes)
---
*AI Analytics · CC0 1.0*