# Proposed AD 2000-NE-03-AD: Rolls-Royce Spey 555-15, -15H, -15N, and -15P Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-23-11
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 7, 2000, 65 FR 41884
- Comments due: September 5, 2000
- Became: [AD 2000-23-11](https://openairdocs.org/ad/2000-23-11)
- Docket: 2000-NE-03-AD
- FR document: 00-17230
- Official PDF: https://openairdocs.org/files/sha256/8a/ec/8aec979d9a70d472a4b5b3206514fafcb8e98d415ccff302d63f116a24b4d228 (from https://www.govinfo.gov/content/pkg/FR-2000-07-07/pdf/00-17230.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/07/07/00-17230/airworthiness-directives-rolls-royce-spey-555-15--15h--15n-and--15p-turbofan-engines
- Page: https://openairdocs.org/proposed/2000-NE-03-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Rolls-Royce (RR) plc Spey 555-15, -15H, -15N, and -15P turbofan engines. This proposal would require modification of the low pressure (LP) turbine stage 2 nozzle guide vane (NGV) support ring seal assembly. This proposal is prompted by two instances of disk drive arm damage. In both cases, heavy damage to the stage 1 LP turbine to stage 2 LP turbine disk drive arm occurred as a result of an out of balance condition following the failure of a stage 2 LP turbine blade. The actions specified by the proposed AD are intended to prevent damage to the disk drive arm which could result in loss of stage 1 LP turbine to stage 2 LP turbine disk drive, a turbine overspeed condition and possible uncontained disk failure and damage to the airplane.

## Notices in this docket

- Jul 7, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-17230, comments due Sep 5, 2000 (https://www.federalregister.gov/documents/2000/07/07/00-17230/airworthiness-directives-rolls-royce-spey-555-15--15h--15n-and--15p-turbofan-engines)

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