The concern sheet
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U.S. Department of Transportation
Federal Aviation Administration Airworthiness Concern Sheet Date: September 11, 2025
Reply to:
Name: Kristi Bradley Title: Aviation Safety Coordinator Office: Operational Safety Branch Street Address: 10101 Hillwood Pkwy City, State, ZIP: Fort Worth, TX 76177 Telephone: 817-222-5485 Electronic Mail: Kristin.Bradley@faa.gov
Make: Lancair Model / Series: Evolution Serial Numbers: All Reason for Airworthiness Concern: Damaged Elevator Control Horn Federal Aviation Administration (FAA) Description of Airworthiness Concern The FAA recently received a report of a damaged elevator control horn, part number (PN) 435-0004, on a Lancair Evolution aircraft. The mechanic noticed excessive play of the elevator flight controls during a routine inspection.
Upon further inspection with the access panels removed, the elevator control horn was found visibly damaged, exhibiting signs of severe cracking and corrosion inside and around the control horn. Images of the affected part can be found in Figure 1, and photos of the subject damage are shown in Figure 2.
Failure of the elevator control horn may lead to loss of control of the aircraft. The FAA is currently investigating this concern.
Request for Information The FAA advises owners and operators of Lancair Evolution aircraft of potential damage of the elevator control horn. We recommend conducting a detailed visual inspection to check for any signs of cracking, corrosion, or other damage both inside and around the control horn.
If you discover damage, please report your findings to the FAA point of contact. Please include a description of the damage, photographs, recommended inspection techniques to locate the damage, the aircraft's serial number, the damaged part’s time in service, and any other information that may assist in our evaluation of this issue.
This Airworthiness Concern Sheet (ACS) is intended as a means for FAA Aviation Safety Engineers to coordinate airworthiness concerns with aircraft owners/operators through associations and type clubs. At this time, the FAA has not made a determination on what type of corrective action (if any) should be taken. The resolution of this airworthiness concern could involve Airworthiness Directive (AD) action or a Special Airworthiness Information Bulletin (SAIB), or the FAA could determine that no action is needed at this time. The FAA’s final determination will depend in part on the information received in response to this ACS.
The FAA endorses dissemination of this technical information to all manufacturers and requests association and type club comments.
Attachments:
Service Difficulty Report Accident/Incident Data System Service Letter / Bulletin Special Airworthiness Information Bulletin FAA or National Transportation Safety Board Safety Recommendation Airworthiness Directive Alternate Means of Compliance Risk Analysis Transmittal:
Federal Aviation Administration Airplane Owners and Pilots Association Experimental Aircraft Association Type Club Type Certificate Holder Other:
Response Requested By:
Emergency (10 days) Alert (30 days) Information (90 days)
Figure 1: Elevator Control Horn, PN 435-0004, Highlighted
Figure 2: Elevator Control Horn Damage Found During Inspection