# Airworthiness Directives; CFM International CFM56-2, -3, -3B, and -3C Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 1998-03-30 · Effective 1998-03-30 · 63 FR 15073
## Document
- **Document number:** 98-7560
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 15073
- **Publication date:** 1998-03-30
- **Effective date:** 1998-03-30
- **FAA docket:** Docket No. 98-ANE-16-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to CFM International CFM56-2, -3, -3B, and -3C series turbofan engines. This action requires the removal from service of certain No. 3 bearing rear stationary air/oil seals, replacement with serviceable parts, and the installation of retention bushings. This action also requires the removal from service of high pressure compressor rotor (HPCR) stage 1-2 spools that have contacted the outer cone of the seal. This amendment is prompted by several reports of outer cone separation of the No. 3 bearing rear stationary air/oil seal. The actions specified in this AD are intended to prevent rubs between the outer cone of the No. 3 bearing rear stationary air/oil seal and the HPCR stage 1-2 spool, which could result in a potential uncontained failure of the HPCR stage 1-2 spool, and damage to the aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/03/30/98-7560/airworthiness-directives-cfm-international-cfm56-2--3--3b-and--3c-series-turbofan-engines)
---
*MORVS · CC0 1.0*