# Proposed AD 95-ANE-65: CFM International CFM56-5/-5B/-5C Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-06-01
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 4, 1996, 61 FR 28112
- Comments due: August 5, 1996
- Became: [AD 97-06-01](https://openairdocs.org/ad/97-06-01)
- Docket: 95-ANE-65
- FR document: 96-13890
- Official PDF: https://openairdocs.org/files/sha256/bf/3d/bf3da5299e658b85a3eaace3f3088ea81d33e10d6e3ebf74ce1a1614cf6ba13c (from https://www.govinfo.gov/content/pkg/FR-1996-06-04/pdf/96-13890.pdf)
- Federal Register: https://www.federalregister.gov/documents/1996/06/04/96-13890/airworthiness-directives-cfm-international-cfm56-5-5b-5c-series-turbofan-engines
- Page: https://openairdocs.org/proposed/95-ANE-65

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to CFM International (CFMI) CFM56-5/- 5B/-5C series turbofan engines. This proposal would require initial and repetitive borescope inspections of the stage 1 disk bore of certain high pressure compressor rotor (HPCR) stage 1-2 spools for rubs and scratches, and replacement, if found rubbed or scratched, with a serviceable part. This proposal would also require removal and replacement of certain stationary number 3 bearing aft air/oil seals as terminating action to the inspection program. This proposal is prompted by a report of an engine found with a rub on the forward corner of the HPCR stage 1 disk bore due to contact with the stationary number 3 bearing aft air/oil seal. The actions specified by the proposed AD are intended to prevent a failure of the stage 1 disk of the HPCR stage 1-2 spool, which could result in an uncontained engine failure and damage to the aircraft.

## Notices in this docket

- Jun 4, 1996: Notice of proposed rulemaking (NPRM). (first notice), FR document 96-13890, comments due Aug 5, 1996 (https://www.federalregister.gov/documents/1996/06/04/96-13890/airworthiness-directives-cfm-international-cfm56-5-5b-5c-series-turbofan-engines)

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