# Proposed AD FAA-2007-27533: Diamond Aircraft Industries GmbH Model DA 42 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Diamond
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 13, 2007, 72 FR 18598
- Comments due: May 14, 2007
- Docket: FAA-2007-27533 (https://www.regulations.gov/docket/FAA-2007-27533, where comments are filed)
- Project: 2007-CE-022-AD
- FR document: E7-7050
- Official PDF: https://openairdocs.org/files/sha256/82/e5/82e5ed11827e6a0987dd4bd7a93d0ccb3e4e36ac162e504377aff7a2d904dcef (from https://www.govinfo.gov/content/pkg/FR-2007-04-13/pdf/E7-7050.pdf)
- Federal Register: https://www.federalregister.gov/documents/2007/04/13/E7-7050/airworthiness-directives-diamond-aircraft-industries-gmbh-model-da-42-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5EF4F1C375C20A1E862572BC0050831E.0001
- Page: https://openairdocs.org/proposed/FAA-2007-27533

## 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) originated 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:

Shortly after an engine change, the aluminium fitting attached to the engine gearbox holding lines and fittings of the propeller control system was found to be cracked. This led to a pressure loss in the propeller control system following a control system malfunction and led to an in-flight engine shutdown.

The broken fitting is part of the engine installation and was initially a steel part. It was later modified by the engine manufacturer to an aluminium design.

Investigation determined that the area is critical for cracks due to combination of mass, material and installation torque values.

Diamond Aircraft Industries incorporated with Design Change M[Auml]M 42-184 an additional bracket into production airplanes to improve the installations and prevent vibration cracks.

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

## Notices in this docket

- Apr 13, 2007: Notice of proposed rulemaking (NPRM). (first notice), FR document E7-7050, comments due May 14, 2007 (https://www.federalregister.gov/documents/2007/04/13/E7-7050/airworthiness-directives-diamond-aircraft-industries-gmbh-model-da-42-airplanes)

---
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.