Type of Notification
regular notification
Date of Distribution
WTO Country
Agency Responsible
Federal Aviation Administration (FAA) [1409]
Regions Affected
Please submit comments to: USA WTO TBT Enquiry Point, Email: usatbtep@nist.gov
Notified Document Details
<p style="margin:2px !important;">Yaw Maneuver Conditions--Rudder Reversals</p>
ICS Code
Covered Products
<p style="margin:2px !important;">Transport category airplanes</p>
Description of Content

The FAA proposes to add a new load condition to the design standards for transport category airplanes. The new load condition would require the airplane be designed to withstand the loads caused by rapid reversals of the rudder pedals and would apply to transport category airplanes that have a powered rudder control surface or surfaces. This rule is necessary because accident and incident data show that pilots sometimes make rudder reversals during flight, even though such reversals are unnecessary and discouraged by flightcrew training programs. The current design standards do not require the airplane structure to withstand the loads that may result from such reversals. If the airplane loads exceed those for which it is designed, the airplane structure may fail, resulting in catastrophic loss of control of the airplane. This proposal aims to prevent structural failure of the rudder and vertical stabilizer that may result from these rudder reversals.

Relevant Documents

83 Federal Register (FR) 32807, 16 July 2018; Title 14 Code of Federal Regulations (CFR) Part 25.  Will appear in the Federal Register when adopted.

Final Date of Comments
Document Online Link (EN)
Notified Under
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