# Proposed AD FAA-2014-0345: Beechcraft Corporation (Type Certificate Previously Held by Hawker Beechcraft Corporation; Raytheon Aircraft Company; Beech Aircraft Corporation) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-21-06
- Products: Beechcraft
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 30, 2014, 79 FR 36675
- Comments due: August 29, 2014
- Became: [AD 2014-21-06](https://openairdocs.org/ad/2014-21-06)
- Docket: FAA-2014-0345 (https://www.regulations.gov/docket/FAA-2014-0345, where comments are filed)
- Project: 2013-NM-230-AD
- FR document: 2014-15246
- Official PDF: https://openairdocs.org/files/sha256/88/18/8818125f109a4a78c913b82494968bdd28cb3b8007110e3086f349f0c2faabf8 (from https://www.govinfo.gov/content/pkg/FR-2014-06-30/pdf/2014-15246.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/06/30/2014-15246/airworthiness-directives-beechcraft-corporation-type-certificate-previously-held-by-hawker
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0808717339762E0486257D07004B9C3A.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0345

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Beechcraft Corporation (Type Certificate Previously Held by Hawker Beechcraft Corporation; Raytheon Aircraft Company; Beech Aircraft Corporation) Model 400, 400A, 400T, and MU-300 airplanes. This proposed AD was prompted by a report of a failure of the Acme nut threads in a pitch trim actuator (PTA). This proposed AD would require an inspection to determine if PTAs having a certain serial number and part number are installed, and replacement if they are installed. This proposed AD would also require repetitive replacements of PTAs with new PTAs or certain overhauled PTAs. We are proposing this AD to prevent failure of the Acme nut threads in the PTA, which could lead to loss of control of pitch trim and reduced controllability of the airplane.

## Notices in this docket

- Jun 30, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-15246, comments due Aug 29, 2014 (https://www.federalregister.gov/documents/2014/06/30/2014-15246/airworthiness-directives-beechcraft-corporation-type-certificate-previously-held-by-hawker)

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