# Proposed AD FAA-2014-0108: Mitsubishi Heavy Industries, Ltd. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-01-02
- Products: Mitsubishi Heavy Industries
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 26, 2014, 79 FR 10710
- Comments due: April 14, 2014
- Became: [AD 2015-01-02](https://openairdocs.org/ad/2015-01-02)
- Docket: FAA-2014-0108 (https://www.regulations.gov/docket/FAA-2014-0108, where comments are filed)
- Project: 2013-CE-052-AD
- FR document: 2014-04146
- Official PDF: https://openairdocs.org/files/sha256/bc/6e/bc6eab089e22511e8640caa306a39f387e0dda23a2fcebb2a17cf9874923c622 (from https://www.govinfo.gov/content/pkg/FR-2014-02-26/pdf/2014-04146.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/02/26/2014-04146/airworthiness-directives-mitsubishi-heavy-industries-ltd-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/878A2722A31C602E86257C8B004D1E15.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0108

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Mitsubishi Heavy Industries, Ltd. Models MU-2B-30, MU-2B-35, MU-2B-36, MU-2B-36A, and MU-2B-60 airplanes. 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 stress corrosion cracking in the flanges of the airframe at stations 4610 and 5605. We are issuing this proposed AD to require actions to address the unsafe condition on these products.

## Notices in this docket

- Feb 26, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-04146, comments due Apr 14, 2014 (https://www.federalregister.gov/documents/2014/02/26/2014-04146/airworthiness-directives-mitsubishi-heavy-industries-ltd-airplanes)

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