The concern sheetOCR
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Airworthiness FAA Concern Sheet Date: June 27, 2008 Wess Rouse Small Airplane Project Manager Chicago Aircraft Certification Office Make, Model, Series, Serial No.:
Cirrus Design Corporation (CDC) Model SR20 Systems & Flight Test Branch 2300 E. Devon Ave. Reason for Airworthiness Concern:
Des Plaines, IL 60018 Possible nose gear failure resulting in significant aircraft damage.
847-294-8113 Wess.Rouse@faa.gov FAA Description of Airworthiness Concern (Who, What, Where, When, How? Attachments: RA and appropriate data) This concern originated from Cirrus Design Corporation (CDC) by email sent on June 10, 2008 notifying the Aircraft Certification Office (ACO) of recent SR20 nose gear weldment cracking. At one flight school cracks progressed to the point of complete failure of the nose gear yoke, resulting in dropping the aircraft on the propeller. Examination of the aircraft revealed that the cracking was adjacent to the top plate, aft edge of the weld, in the rectangular tubing not the weld itself. As of the writing of this airworthiness concern CDC is in the process of issuing a Service Bulletin.
Request for Information (Proposed Alternate Inspection/Repair Procedures, Cost Impact, Etc. Note: Any comments or replies to the FAA need to be as specific as possible. Please provide specific examples to illustrate your comments/concerns.):
Please review and provide us with additional information, which may affect the airworthiness action taken by the FAA. This includes any additional findings, accidents/incidents, or service difficulties pertaining to this airworthiness concern.
This Airworthiness Concern Sheet (ACS) is intended as a means for FAA Aviation Safety Engineers to coordinate airworthiness concerns with aircraft owner/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 an AD action or an 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 clubs comments.
Attachments: *SDR(s) X *A/IDS_ | *SL(s)| _ *SAIB| *FAASR/*NTSBS_ *AD *AMOC_*RA| Notification: FAA X ¡ *AOPA X *EAA Type Club [X | *TC Holder L Other:
Response Requested 07/25/08: Emergency (10 days) Alert (30 days) Information (90 days) L (Space Bar Adds "X" to Check Boxes) *Service Difficulty Reports (SDRs); Accident/Incident Data System (A/IDS); Service Letter (SL); Special Airworthiness Information Bulletin (SAIB);
Federal Aviation Administration (FAA)/National Transportation Safety Board (NTSB) Safety Recommendation (FAASR/NTSBSR); Airworthiness Directive (AD); Alternate Method of Compliance (AMOC); Risk Assessment (RA); Aircraft Owners & Pilots Association (AOPA);
Experimental Aircraft Association (EAA); Type Certificate (TC) Revised 1/24/02