NTSB makes recommendations to European Aviation Safety Agency.
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Press Release Summary:
According to NTSB, European Aviation Safety Agency Certification Specifications for Large Aeroplanes CS-25 should be modified to ensure safe handling qualities in yaw axis throughout flight envelope, including limits for rudder pedal sensitivity (A-10-119). If adequate protection does not exist, EASA should require modifications, as necessary, to provide airplanes with increased protection from adverse effects of potential Aircraft-Pilot Coupling after rudder inputs at high airspeeds (A-10-120).
Original Press Release:
NTSB Safety Recommendation A-10-119 and -120
NTSB Safety Recommendation A-10-119 and -120 and Reiteration of NTSB Safety Recommendation A-04-63
The National Transportation Safety Board recommends that the European Aviation Safety Agency:
Modify European Aviation Safety Agency Certification Specifications for Large Aeroplanes CS-25 to ensure safe handling qualities in the yaw axis throughout the flight envelope, including limits for rudder pedal sensitivity. (A-10-119)
After the yaw axis certification standard recommended in Safety Recommendation A-10-119 has been established, review the designs of existing airplanes to determine if they meet the standard. For existing airplane designs that do not meet the standard, the European Aviation Safety Agency (EASA) should determine if the airplanes would be adequately protected from the adverse effects of a potential aircraft-pilot coupling (APC) after rudder inputs at all airspeeds. If adequate protection does not exist, EASA should require modifications, as necessary, to provide the airplanes with increased protection from the adverse effects of a potential APC after rudder inputs at high airspeeds. (A-10-120)
In addition, the National Transportation Safety Board reiterates the following recommendation to the European Aviation Safety Agency:
Review the options for modifying the Airbus A300-600 and the Airbus A310 to provide increased protection from potentially hazardous rudder pedal inputs at high airspeeds and, on the basis of this review, require modifications to the A300-600 and A310 to provide increased protection from potentially hazardous rudder pedal inputs at high airspeeds. (A-04-63)
http://ntsb.gov/recs/letters/2010/A-10-119-120.pdf
The complete recommendation letter is available on the Web at the URL indicated above.
The letter is in the Portable Document Format (PDF) and can be read using the Acrobat Reader 5.0 or later from Adobe (http://www.adobe.com/prodindex/acrobat/readstep.html).
An archive of recommendation letters is available at www.ntsb.gov/recs/letters/letters.htm.
Electronic versions of letters may or may not include enclosures; however, related publications, accident briefs, and aviation accident synopses may be found on the NTSB website.
