The concern sheetOCR
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Airworthiness FAA Concern Sheet Date: Sept. 12, 2008 Full Name: John M. Lee Title: Aerospace Engineer Organization: Atlanta ACO Department: Systems & Equip, ACE-119A Address: 1895 Phoenix Boulevard, Suite 450 City State ZIP: Atlanta, GA 30349 Telephone Number: 770-994-6736 E-mail: John.Lee@faa.gov Make, Model, Series, Serial No.: Piper Aircraft PA-46-350P Mirage Serial Numbers 4636375-4636447 PA-46R-350T Matrix Serial Numbers 4692001-4692068 Reason for Airworthiness Concern: Current Limiters May Be Incorrectly Installed FAA Description of Airworthiness Concern (Who, What, Where, When. How? Attachments: RA and appropriate data) While troubleshooting an alternator problem during maintenance on 29 Aug2008 at KCAC DSA Wayne Andrews, found the 35 amp current limiter fuse (P/N 572-599) was blown. Further investigation found the 250 amp current limiter (P/N 461-681) on the electrical power panel assembly (P/N 105134-002) was installed in the wrong location, i.e. where the 35 amp current limiter (P/N 572-599) should be installed, and vice versa.
Left uncorrected, the configuration described above could cause the 35 amp current limiter to create an open circuit condition during normal use, resulting in a total loss of aircraft electrical power.
The attached risk assessment reveals a "Hazardous" safety effect caused by this situation and indicates a Notice of Proposed Rulemaking for an Airworthiness Directive is warranted.
We request Piper issue a service bulletin requiring the verification that the 35 amp and 250 amp current limiters are installed at the correct location.
Piper responded:
Piper brought this condition to the attention of the FAA Atlanta ACO and produced the attached emergency draft Service Bulletin 2000. This Service Bulletin contains instructions to correct this condition.
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.):
The FAA is considering issuing a Notice of Proposed Rulemaking for an Airworthiness Directive requiring modification of affected aircraft. We are soliciting additional information from Associations and Type Clubs in accordance with the Small Airplane Directorate AD Manual Supplement. Any additional information such as service problems, proposed alternate inspection/repair procedures, cost impact, etc. should be returned in writing to the FAA (address listed above). Note: Any comments or replies to the FAA need to be as specific as possible. Please provide specific examples to illustrate your comments/concerns.
Attachments:
• Risk Assessment
• Piper Service Bulletin 2000, Emergency Draft 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) • *A/IDS*SL(s) • *SAIBL*FAASR/NTSBSR *ADU] *АМОСП *RAL Notification: FAA *AOPA Type Club I *TC Holder Other:
Response Requested 06/02/08: Emergency (10 days) • Alert (30 days) Information (90 days) L *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 (APA):
Experimental Aircraft Association (EAA); Type Certificate (TC)