# Proposed AD FAA-2006-24846: Microturbo Saphir 20 Models 095 Auxiliary Power Units (APU)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2007-05-20
- Products: Microturbo Saphir
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 18, 2006, 71 FR 75684
- Comments due: January 17, 2007
- Became: [AD 2007-05-20](https://openairdocs.org/ad/2007-05-20)
- Docket: FAA-2006-24846 (https://www.regulations.gov/docket/FAA-2006-24846, where comments are filed)
- Project: 2006-NE-21-AD
- FR document: E6-21487
- Official PDF: https://openairdocs.org/files/sha256/3f/19/3f19babed1d541cef6e16bd602dfa6084caa4a51dba3ae4d904da3edcae401d4 (from https://www.govinfo.gov/content/pkg/FR-2006-12-18/pdf/E6-21487.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/12/18/E6-21487/airworthiness-directives-microturbo-saphir-20-models-095-auxiliary-power-units-apu
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/45F653C91831F1E08625724800508558.0001
- Page: https://openairdocs.org/proposed/FAA-2006-24846

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

It has been reported that with the existing configuration, a certain failure could cause overspeed of the gas generator rotor resulting in uncontained burst of the turbine liberating high-energy fragments.

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Dec 18, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-21487, comments due Jan 17, 2007 (https://www.federalregister.gov/documents/2006/12/18/E6-21487/airworthiness-directives-microturbo-saphir-20-models-095-auxiliary-power-units-apu)

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