# Proposed AD FAA-2010-1192: Viking Air Limited (Type Certificate No. A-815 Formerly Held by Bombardier Inc. and de Havilland, Inc.) Model DHC-3 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-05-02
- Products: Viking Air
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 7, 2010, 75 FR 75932
- Comments due: January 21, 2011
- Became: [AD 2011-05-02](https://openairdocs.org/ad/2011-05-02)
- Docket: FAA-2010-1192 (https://www.regulations.gov/docket/FAA-2010-1192, where comments are filed)
- Project: 2010-CE-020-AD
- FR document: 2010-30614
- Official PDF: https://openairdocs.org/files/sha256/59/ad/59ad83d7f14d0ebb038123e1cff50b48233bfb982dd08099433a4d100f09c17b (from https://www.govinfo.gov/content/pkg/FR-2010-12-07/pdf/2010-30614.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/12/07/2010-30614/airworthiness-directives-viking-air-limited-type-certificate-no-a-815-formerly-held-by-bombardier
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D9CCB3B2BEB4B39F862577F200558C55.0001
- Page: https://openairdocs.org/proposed/FAA-2010-1192

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require repetitively inspecting the elevator control tabs for discrepancies and, if any discrepancies are found, taking necessary corrective actions to bring all discrepancies within acceptable tolerances. This proposed AD results from an evaluation of revisions to the manufacturer's maintenance manual that adds new repetitive inspections of the elevator control tabs. To require compliance with these inspections for U.S. owners and operators we are proposing the inspections through the rulemaking process. We are proposing this AD to add new repetitive inspections of the elevator control tabs. If these inspections are not done, excessive free-play in the elevator control tabs could develop. This condition could lead to loss of tab control linkage and severe elevator flutter. Such elevator flutter could lead to possible loss of control.

## Notices in this docket

- Dec 7, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-30614, comments due Jan 21, 2011 (https://www.federalregister.gov/documents/2010/12/07/2010-30614/airworthiness-directives-viking-air-limited-type-certificate-no-a-815-formerly-held-by-bombardier)

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