# Proposed AD FAA-2006-24825: Rolls-Royce Deutschland Ltd & Co KG (RRD) Dart 528, 529, 532, 535, 542, and 552 Series Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-02-07
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 9, 2007, 72 FR 63508
- Comments due: January 8, 2008
- Became: [AD 2007-02-07](https://openairdocs.org/ad/2007-02-07)
- Docket: FAA-2006-24825 (https://www.regulations.gov/docket/FAA-2006-24825, where comments are filed)
- Project: 2006-NE-17-AD
- FR document: E7-22003
- Official PDF: https://openairdocs.org/files/sha256/64/ae/64aebebd2a88e2a59ba86dde824b48d4d8aea6d27970e19c1057e42777820892 (from https://www.govinfo.gov/content/pkg/FR-2007-11-09/pdf/E7-22003.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/11/09/E7-22003/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-rrd-dart-528-529-532-535-542-and-552
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/81F005966AF6F5928625738E0055A8C7.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24825

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for (RRD) Dart 528, 529, 532, 535, 542, and 552 Series turboprop engines. That AD currently requires a dimensional inspection of the intermediate pressure turbine (IPT) disk or an ultrasonic inspection of the seal arm contact between the high pressure turbine (HPT) and the IPT disk seal arm and reworking or replacing the IPT disk if worn beyond acceptable limits. This proposed AD would continue to require those actions. This proposed AD results from us including an incorrect engine model and omitting an engine model from the applicability of the existing AD. We are proposing this AD to prevent HPT disk failure, which can result in an uncontained engine failure and damage to the airplane.

## Notices in this docket

- Jul 11, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-10772, comments due Sep 11, 2006 (https://www.federalregister.gov/documents/2006/07/11/E6-10772/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-formerly-rolls-royce-plc-dart-528-529)
- Nov 9, 2007: Notice of proposed rulemaking (NPRM)., FR document E7-22003, comments due Jan 8, 2008 (https://www.federalregister.gov/documents/2007/11/09/E7-22003/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-rrd-dart-528-529-532-535-542-and-552)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.