# Proposed AD FAA-2016-9393: Airbus Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-13-05
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 19, 2016, 81 FR 91882
- Comments due: February 2, 2017
- Became: [AD 2017-13-05](https://openairdocs.org/ad/2017-13-05)
- Docket: FAA-2016-9393 (https://www.regulations.gov/docket/FAA-2016-9393, where comments are filed)
- Project: 2014-NM-199-AD
- FR document: 2016-29683
- Official PDF: https://openairdocs.org/files/sha256/f1/75/f175203b76fd1687792193dce50b277e25d0b88e483c9af9980df7d2ceea37b0 (from https://www.govinfo.gov/content/pkg/FR-2016-12-19/pdf/2016-29683.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/12/19/2016-29683/airworthiness-directives-airbus-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EA1649E2C54B77E38625808E005250C7.0001
- Page: https://openairdocs.org/proposed/FAA-2016-9393

## Summary

We propose to supersede Airworthiness Directive (AD) 2013-13- 16, which applies to all Airbus Model A330-200, A330-200 Freighter, A330-300 series airplanes, and all Airbus Model A340-200, -300, -500, and -600 series airplanes. AD 2013-13-16 currently requires repetitive inspections for discrepancies of the ball-screw assembly of the trimmable horizontal stabilizer actuator (THSA), repetitive greasing of the THSA ball-nut, and replacement of the THSA if necessary; and modification or replacement (as applicable) of the ball-nut assembly, which ends certain repetitive inspections. Since we issued AD 2013-13- 16, we have determined that a modification that automatically detects failure of the ball-screw assembly is necessary. This proposed AD would require an inspection, corrective actions if necessary, lubrication of the ball-nut, modification of the THSA, and removal of certain airplanes from the applicability. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 19, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-29683, comments due Feb 2, 2017 (https://www.federalregister.gov/documents/2016/12/19/2016-29683/airworthiness-directives-airbus-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.