# Proposed AD FAA-2013-0393: Twin Commander Aircraft LLC Airplanes; Initial Regulatory Flexibility Analysis

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-09-05
- Action: Availability of an initial regulatory flexibility analysis.
- Published: October 29, 2013, 78 FR 64417
- Comments due: December 13, 2013
- Became: [AD 2013-09-05](https://openairdocs.org/ad/2013-09-05)
- Docket: FAA-2013-0393 (https://www.regulations.gov/docket/FAA-2013-0393, where comments are filed)
- Project: 2012-CE-025-AD
- FR document: 2013-25526
- Official PDF: https://openairdocs.org/files/sha256/7e/87/7e8713302332eb5c9b35f7f91be99f6e76f783661052db404d1657fbcf39c835 (from https://www.govinfo.gov/content/pkg/FR-2013-10-29/pdf/2013-25526.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/10/29/2013-25526/airworthiness-directives-twin-commander-aircraft-llc-airplanes-initial-regulatory-flexibility
- Page: https://openairdocs.org/proposed/FAA-2013-0393

## Summary

This document announces the availability of and request for comments on the initial regulatory flexibility analysis for the previously published Airworthiness Directive (AD) 2013-09-05 that applies to certain Twin Commander Aircraft LLC Models 690, 690A, and 690B airplanes. AD 2013-09-05 requires inspection for cracking of the outer fuselage attachments, the lower wing main spar, the vertical channels, the upper picture window channels, aft cabin pressure web, external wing to fuselage fillets, and fasteners; repair or replacement of damaged parts as necessary; and modification of the structure with reinforced parts.

## Notices in this docket

- Oct 29, 2013: Availability of an initial regulatory flexibility analysis. (first notice), FR document 2013-25526, comments due Dec 13, 2013 (https://www.federalregister.gov/documents/2013/10/29/2013-25526/airworthiness-directives-twin-commander-aircraft-llc-airplanes-initial-regulatory-flexibility)

---
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.