NTSB Safety Recommendations A-07-52 through -54

[NTSB Press Releases <NTSBPressReleases@xxxxxxxx>]

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                   NTSB SAFETY RECOMMENDATION
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National Transportation Safety Board
Washington, DC 20594

September 13, 2007

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NTSB Safety Recommendations A-07-52 through -54

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The National Transportation Safety Board recommends that the 
Federal Aviation Administration:

Require Cessna to modify the Citation 525 to incorporate an 
aural trim-in-motion warning and the addition of contrasting 
color bands on the pitch trim wheel to provide the pilot 
with more timely recognition of a trim runaway condition 
before control forces become unmanageable. (A-07-52)

Require Cessna to perform analysis and conduct a test to 
demonstrate that the maximum control forces in a Cessna 
Citation 525 meet the certification requirements of 14 Code 
of Federal Regulations Part 23 during a pitch trim runaway 
condition. The analysis and test should comply with the 
pilot-recognition time requirements provided in Advisory 
Circular 23-8, "Flight Test Guide for Certification of Part 
23 Airplanes." If, after accomplishing the analysis and 
test, Cessna is unable to demonstrate that the Citation 525 
meets the certification requirements, require Cessna to take 
corrective action so that the airplane does meet 
certification requirements. (A-07-53)

Require Cessna to replace the pitch trim circuit breaker on 
the Citation 525 with a collared circuit breaker to aid the 
pilot in quickly identifying it if necessary. (A-07-54)

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http://www.ntsb.gov/Recs/letters/2007/A07_52_54.pdf

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Electronic versions of letters may or may not include 
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